William MacAskill is an Associate Professor of Philosophy at Oxford University. His academic work spans a breadth of fields within normative philosophy, including practical ethics, population ethics, social choice theory and decision theory. MacAskill is the cofounder of Giving What We Can, 80,000 Hours, the Centre for Effective Altruism and the Oxford University-based Global Priorities Institute.

'I was captivated by MacAskill’s rolling out of the possibilities of a longtermist approach to the now. It is vital to do as he does, to take ethics out of the safety of lecture-hall thought experiments, paradoxes and what-ifs and into the turbulent real world, where the dynamic winds of history blow and where is massing on the horizon that monstrous, swelling tsunami that we call the future. This is a book of great daring, clarity, insight and imagination. To be simultaneously so realistic and so optimistic, and always so damn readable… well that is a miracle for which he should be greatly applauded.' —Stephen Fry

William MacAskill is an Associate Professor of Philosophy at Oxford University. His academic work spans a breadth of fields within normative philosophy, including practical ethics, population ethics, social choice theory and decision theory. MacAskill is the cofounder of Giving What We Can, 80,000 Hours, the Centre for Effective Altruism and the Oxford University-based Global Priorities Institute.

'I was captivated by MacAskill’s rolling out of the possibilities of a longtermist approach to the now. It is vital to do as he does, to take ethics out of the safety of lecture-hall thought experiments, paradoxes and what-ifs and into the turbulent real world, where the dynamic winds of history blow and where is massing on the horizon that monstrous, swelling tsunami that we call the future. This is a book of great daring, clarity, insight and imagination. To be simultaneously so realistic and so optimistic, and always so damn readable… well that is a miracle for which he should be greatly applauded.' —Stephen Fry

William MacAskill is an Associate Professor of Philosophy at Oxford University. His academic work spans a breadth of fields within normative philosophy, including practical ethics, population ethics, social choice theory and decision theory. MacAskill is the cofounder of Giving What We Can, 80,000 Hours, the Centre for Effective Altruism and the Oxford University-based Global Priorities Institute.

'I was captivated by MacAskill’s rolling out of the possibilities of a longtermist approach to the now. It is vital to do as he does, to take ethics out of the safety of lecture-hall thought experiments, paradoxes and what-ifs and into the turbulent real world, where the dynamic winds of history blow and where is massing on the horizon that monstrous, swelling tsunami that we call the future. This is a book of great daring, clarity, insight and imagination. To be simultaneously so realistic and so optimistic, and always so damn readable… well that is a miracle for which he should be greatly applauded.' —Stephen Fry