While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

Peter Unger's provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas." In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there's a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there's a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger's terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas. It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis's theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - andthis condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophicalperspective.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - andthis condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophicalperspective.

Unger contends that our institutions about ethical cases are generated not by basic moral values, but by certain distracting moral mechanisms that encourage deceptive reactions.In the first part of the book, he argues that, appearances to the contrary, our basic moral values are quite close to what philosophers now call act consequentialism. He details the nature of the most potent of the mechanisms that cause us to have false intuitions, and explains how, by blinding us to our basic moral values, they generate those reactions.In the second part of the book Unger proposes a complex and novel metaethics, arguing that each of us can easily generate either a lenient or tough context for our ethical assessments. In Unger's view we almost always generate lenient contexts, in which we can correctly make permissive judgments about our behaviour. If we generate tough contexts, however, we will judge our ordinary behaviour to be morally wrong. Even while we can allow that most of our moral judgements to date have been correct, we can still assert that our basic moral values, and so most likely ethical reality itself, are actively compassionate and very demanding of us.Unger's conclusions - that many of our moral judgements are in error, and accordingly much of our behaviour is grossly immoral - will be controversial and have a strong impact on the field of ethics.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we've already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger's book points the way to a compassionate new moral philosophy.

While well-known for his book-length work, philosopher Peter Unger's articles have been less widely accessible. These two volumes of Unger's Philosophical Papers include articles spanning more than 35 years of Unger's long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger's work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger's significant work are well represented in this major two volume collection. Unger's vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

In this short volume (first published in 1984), Peter Unger questions the objective answers that have have been given to traditional problems in philosopy. He casts doubt on the generally unquestioned view that fundamental questionspertaining to meaning and existence have direct solutions, arguing that by their very nature they remain ultimiately unanswerable. He suggests that the answers to these questions must be viewed in terms of a general philosophical and semantic relativily, proposing that truth cannot be arrived at in absolute sense but rather with relative degrees of precision. Written with unusual clarity, Philosophical Relativity, is provocative, highly readable and ambitious in scope.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality-and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

While well-known for his book-length work, philosopher Peter Unger's articles have been less widely accessible. These two volumes of Unger's Philosophical Papers include articles spanning more than 35 years of Unger's long and fruitful career. Dividing the articles thematically, the first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger's work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger's significant work are well represented in this major two volume collection. Unger's vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerfulparticulars of two basic sorts: one mental but not physical, the other physical but not mental.Whether of one sort or the other, each individual possesses powers for determining hisor her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world.Written in anaccessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectualadventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we''ve already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger''s book points the way to a compassionate new moral philosophy.

In this short but meaty book, Peter Unger questions the objective answers that have been given to central problems in philosophy. As Unger hypothesizes, many of these problems are unanswerable, including the problems of knowledge and scepticism, the problems of free will, and problems of causation and explanation. In each case, he argues, we arrive at one answer only relative to an assumption about the meaning of key terms, terms like "know" and like "cause," even while we arrive at an opposite answer relative to quite different assumptions, but equally arbitrary assumptions, about what the key terms mean.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - and this condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophical perspective.

Peter Unger's provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas. " In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives " differs from our word "believes " in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there's a table before me " whether or not there is a table before her, she will be correct in saying "I perceive there's a table before me " only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger's terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas. It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis's theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas."This incisive book lays crucial challenges at the door of mainstream analytic philosophy, for Unger argues persuasively that (contrary to its explicit self-conception), a great deal of recent philosophy has been concerned with merely conceptual issues-nothing 'concretely substantial'. The book is sure to provoke controversy and healthy debate about the role and value of philosophy." -Amie L. Thomasson, Professor of Philosophy and Cooper Fellow, University of Miami

Peter Unger''s provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas."In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there''s a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there''s a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger''s terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas.It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis''s theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

Peter Unger''s provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas."In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there''s a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there''s a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger''s terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas.It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis''s theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

The topic of personal identity has prompted some of the liveliest and most interesting debates in recent philosophy. In a fascinating new contribution to the discussion, Peter Unger presents a psychologically aimed, but physically based, account of our identity over time. While supporting the account, he explains why many influential contemporary philosophers have underrated the importance of physical continuity to our survival, casting a new light on the work of Lewis, Nagel, Nozick, Parfit, Perry, Shoemaker, and others. Deriving from his discussion of our identity itself, Unger produces a novel but commonsensical theory of the relations between identity and some of our deepest concerns. In a conservative but flexible spirit, he explores the implications of his theory for questions of value and of the good life.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we''ve already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger''s book points the way to a compassionate new moral philosophy.

Mold design is one of the most challenging tasks in injection molding and it is crucial for successful profitable operations. The book compiles the experience of many seasoned designers and presents tried and tested molds that run successfully in production. For this fourth edition, changes and supplements were once again undertaken with the aim of representing the state of the art. The book is written by practitioners for practitioners, describing problem solving in the design and the manufacture of injection molds.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

Peter Unger's provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas." In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there's a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there's a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger's terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas. It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis's theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - andthis condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophicalperspective.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - andthis condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophicalperspective.

Unger contends that our institutions about ethical cases are generated not by basic moral values, but by certain distracting moral mechanisms that encourage deceptive reactions.In the first part of the book, he argues that, appearances to the contrary, our basic moral values are quite close to what philosophers now call act consequentialism. He details the nature of the most potent of the mechanisms that cause us to have false intuitions, and explains how, by blinding us to our basic moral values, they generate those reactions.In the second part of the book Unger proposes a complex and novel metaethics, arguing that each of us can easily generate either a lenient or tough context for our ethical assessments. In Unger's view we almost always generate lenient contexts, in which we can correctly make permissive judgments about our behaviour. If we generate tough contexts, however, we will judge our ordinary behaviour to be morally wrong. Even while we can allow that most of our moral judgements to date have been correct, we can still assert that our basic moral values, and so most likely ethical reality itself, are actively compassionate and very demanding of us.Unger's conclusions - that many of our moral judgements are in error, and accordingly much of our behaviour is grossly immoral - will be controversial and have a strong impact on the field of ethics.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we've already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger's book points the way to a compassionate new moral philosophy.

While well-known for his book-length work, philosopher Peter Unger's articles have been less widely accessible. These two volumes of Unger's Philosophical Papers include articles spanning more than 35 years of Unger's long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger's work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger's significant work are well represented in this major two volume collection. Unger's vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

In this short volume (first published in 1984), Peter Unger questions the objective answers that have have been given to traditional problems in philosopy. He casts doubt on the generally unquestioned view that fundamental questionspertaining to meaning and existence have direct solutions, arguing that by their very nature they remain ultimiately unanswerable. He suggests that the answers to these questions must be viewed in terms of a general philosophical and semantic relativily, proposing that truth cannot be arrived at in absolute sense but rather with relative degrees of precision. Written with unusual clarity, Philosophical Relativity, is provocative, highly readable and ambitious in scope.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality-and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

While well-known for his book-length work, philosopher Peter Unger's articles have been less widely accessible. These two volumes of Unger's Philosophical Papers include articles spanning more than 35 years of Unger's long and fruitful career. Dividing the articles thematically, the first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger's work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger's significant work are well represented in this major two volume collection. Unger's vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerfulparticulars of two basic sorts: one mental but not physical, the other physical but not mental.Whether of one sort or the other, each individual possesses powers for determining hisor her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world.Written in anaccessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectualadventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we''ve already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger''s book points the way to a compassionate new moral philosophy.

In this short but meaty book, Peter Unger questions the objective answers that have been given to central problems in philosophy. As Unger hypothesizes, many of these problems are unanswerable, including the problems of knowledge and scepticism, the problems of free will, and problems of causation and explanation. In each case, he argues, we arrive at one answer only relative to an assumption about the meaning of key terms, terms like "know" and like "cause," even while we arrive at an opposite answer relative to quite different assumptions, but equally arbitrary assumptions, about what the key terms mean.

In this controversial volume (originally published in 1975) Peter Unger suggests that, not only can nothing ever be known, but no one can ever have a reason at all for anything. A consequence of this is that we cannot have any realistic emotional ties: it can never be conclusively said that someone is happy or sad about anything. Finally he argues that no one can ever say, let alone believe, that anything is the case. In order to get beyond this apparent bind - and this condition of ignorance - Unger proposes a radical departure from the linguistic and epistemological systems we have become accustomed to. Epistemologists, as well as philosophers of mind and language will undoubtedly find in this study of the limitations of language an invaluable philosophical perspective.

Peter Unger's provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas. " In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives " differs from our word "believes " in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there's a table before me " whether or not there is a table before her, she will be correct in saying "I perceive there's a table before me " only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger's terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas. It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis's theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas."This incisive book lays crucial challenges at the door of mainstream analytic philosophy, for Unger argues persuasively that (contrary to its explicit self-conception), a great deal of recent philosophy has been concerned with merely conceptual issues-nothing 'concretely substantial'. The book is sure to provoke controversy and healthy debate about the role and value of philosophy." -Amie L. Thomasson, Professor of Philosophy and Cooper Fellow, University of Miami

Peter Unger''s provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas."In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there''s a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there''s a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger''s terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas.It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis''s theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

Peter Unger''s provocative new book poses a serious challenge to contemporary analytic philosophy, arguing that to its detriment it focuses the predominance of its energy on "empty ideas."In the mid-twentieth century, philosophers generally agreed that, by contrast with science, philosophy should offer no substantial thoughts about the general nature of concrete reality. Leading philosophers were concerned with little more than the semantics of ordinary words. For example: Our word "perceives" differs from our word "believes" in that the first word is used more strictly than the second. While someone may be correct in saying "I believe there''s a table before me" whether or not there is a table before her, she will be correct in saying "I perceive there''s a table before me" only if there is a table there. Though just a parochial idea, whether or not it is correct does make a difference to how things are with concrete reality. In Unger''s terms, it is a concretely substantial idea. Alongside each such parochial substantial idea, there is an analytic or conceptual thought, as with the thought that someone may believe there is a table before her whether or not there is one, but she will perceive there is a table before her only if there is a table there. Empty of import as to how things are with concrete reality, those thoughts are what Unger calls concretely empty ideas.It is widely assumed that, since about 1970, things had changed thanks to the advent of such thoughts as the content externalism championed by Hilary Putnam and Donald Davidson, various essentialist thoughts offered by Saul Kripke, and so on. Against that assumption, Unger argues that, with hardly any exceptions aside from David Lewis''s theory of a plurality of concrete worlds, all of these recent offerings are concretely empty ideas. Except when offering parochial ideas, Peter Unger maintains that mainstream philosophy still offers hardly anything beyond concretely empty ideas.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

While well-known for his book-length work, philosopher Peter Unger''s articles have been less widely accessible. These two volumes of Unger''s Philosophical Papers include articles spanning more than 35 years of Unger''s long and fruitful career. Dividing the articles thematically, this first volume collects work in epistemology and ethics, among other topics, while the second volume focuses on metaphysics. Unger''s work has advanced the full spectrum of topics at the heart of philosophy, including epistemology, metaphysics, philosophy of language and philosophy of mind, and ethics. Unger advances radical positions, going against the so-called "commonsense philosophy" that has dominated the analytic tradition since its beginnings early in the twentieth century. In epistemology, his articles advance the view that nobody ever knows anything and, beyond that, argue that nobody has any reason to believe anything--and even beyond that, they argue that nobody has any reason to do anything, or even want anything. In metaphysics, his work argues that people do not really exist--and neither do puddles, plants, poodles, and planets. But, as Unger has often changed his favored positions, from one decade to the next, his work also advances the opposite, "commonsense" positions: that there are in fact plenty of people, puddles, plants and planets and, quite beyond that, we know it all to be true. On most major philosophical questions, both of these sides of Unger''s significant work are well represented in this major two volume collection. Unger''s vivid writing style, intellectual vitality, and fearlessness in the face of our largest philosophical questions, make these volumes of great interest not only to the philosophical community but to others who might otherwise find contemporary philosophy dry and technical.

This bold and original work of philosophy presents an exciting new picture of concrete reality. Peter Unger provocatively breaks with what he terms the conservatism of present-day philosophy, and returns to central themes from Descartes, Locke, Berkeley, Hume and Russell. Wiping the slate clean, Unger works, from the ground up, to formulate a new metaphysic capable of accommodating our distinctly human perspective. He proposes a world with inherently powerful particulars of two basic sorts: one mental but not physical, the other physical but not mental. Whether of one sort or the other, each individual possesses powers for determining his or her own course, as well as powers for interaction with other individuals. It is only a purely mental particular--an immaterial soul, like yourself--that is ever fit for real choosing, or for conscious experiencing. Rigorously reasoning that the only satisfactory metaphysic is one that situates the physical alongside the non-physical, Unger carefully explains the genesis of, and continual interaction of, the two sides of our deeply dualistic world. Written in an accessible and entertaining style, while advancing philosophical scholarship, All the Power in the World takes readers on a philosophical journey into the nature of reality. In this riveting intellectual adventure, Unger reveals the need for an entirely novel approach to the nature of physical reality--and shows how this approach can lead to wholly unexpected possibilities, including disembodied human existence for billions of years. All the Power in the World returns philosophy to its most ambitious roots in its fearless attempt to answer profoundly difficult human questions about ourselves and our world.

The topic of personal identity has prompted some of the liveliest and most interesting debates in recent philosophy. In a fascinating new contribution to the discussion, Peter Unger presents a psychologically aimed, but physically based, account of our identity over time. While supporting the account, he explains why many influential contemporary philosophers have underrated the importance of physical continuity to our survival, casting a new light on the work of Lewis, Nagel, Nozick, Parfit, Perry, Shoemaker, and others. Deriving from his discussion of our identity itself, Unger produces a novel but commonsensical theory of the relations between identity and some of our deepest concerns. In a conservative but flexible spirit, he explores the implications of his theory for questions of value and of the good life.

By contributing a few hundred dollars to a charity like UNICEF, a prosperous person can ensure that fewer poor children die, and that more will live reasonably long, worthwhile lives. Even when knowing this, however, most people send nothing, and almost all of the rest send little. What is the moral status of this behavior? To such common cases of letting die, our untutored response is that, while it is not very good, neither is the conduct wrong. What is the source of this lenient assessment? In this contentious new book, one of our leading philosophers argues that our intuitions about ethical cases are generated not by basic moral values, but by certain distracting psychological dispositions that all too often prevent us from reacting in accord with our commitments. Through a detailed look at how these tendencies operate, Unger shows that, on the good morality that we already accept, the fatally unhelpful behavior is monstrously wrong. By uncovering the eminently sensible ethics that we''ve already embraced fully, and by confronting us with empirical facts and with easily followed instructions for lessening serious suffering appropriately and effectively, Unger''s book points the way to a compassionate new moral philosophy.

Mold design is one of the most challenging tasks in injection molding and it is crucial for successful profitable operations. The book compiles the experience of many seasoned designers and presents tried and tested molds that run successfully in production. For this fourth edition, changes and supplements were once again undertaken with the aim of representing the state of the art. The book is written by practitioners for practitioners, describing problem solving in the design and the manufacture of injection molds.