Jonathan Head is Teaching Fellow at Keele University, UK. He has recently published papers on Kant’s philosophy of religion and various aspects of Schopenhauer’s philosophy.Dennis Vanden Auweele is postdoctoral researcher at the Faculty of Philosophy, KU Leuven (University of Leuven) and assistant professor in philosophy of religion at the Faculty of Theology, RUG (University of Groningen). His publications deal mostly with Kant’s philosophy of religion, Schopenhauer’s philosophy and contemporary philosophy of religion.

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• Introduction Jonathan Head and Dennis Vanden AuweelePart I: The Historical Context of Fourfold Root1. Schopenhauer’s Metaphilosophy: How to Think a World Without ReasonSebastian Gardner2. The Fivefold Rood of the Principle of Sufficient Reason Eric v.d. LuftPart II: (Transcendental) Idealism in and Beyond the Fourfold Root3. Idealism in Fourfold RootJoanthan Head4. "The World Knot": Schopenhauer’s Early Account of the Subject of Knowing and Willing in the Historic and Systematic Context of German IdealismGünter Zöller 5. Schopenhauer’s Early Fourfold Root and the Ghost of Kantian FreedomSandra Shapshay6. ‘A Most Beloved Piece of Nonsense’: The Ontological Argument and MetaphysicsDennis Vanden AuweelePart III: Consciousness and Sensation in Fourfold Root7. Who Gets the Best of the Winged Cherub?: Reid and Schopenhauer Confront Early Modern AnglicanismGraham McAleer8. Idea and Concept in Schopenhauer: From the Early Manuscripts to the World as Will and RepresentationMarco Casucci9. Schopenhauer on Perception, Consciousness, and Self-awarenessLuis de Sousa10. Beyond the Principle of Sufficient Reason?: Schopenhauer’s Aesthetic Phenomenology Bart VandenabeelePart IV: Ethics, Motivation and Action11 The Fourth Root and ‘the Miracle par Excellence’Gudrun von Tevenar and Christine Lopes12 Kant’s Theory of Freedom in Fourfold Root as the Progenitor of Schopenhauer’s Metaphysics of WillRobert Wicks