In Scepticism and Animal Faith, George Santayana opens his philosophical system by confronting radical doubt with unusual rigor and elegance. The book asks what, if anything, survives thoroughgoing scepticism, and answers with the notion of "animal faith": the pre-rational trust by which human beings inevitably believe in the world, the self, memory, and causation. Written in lucid, patrician prose, it belongs to the great early twentieth-century conversation between idealism, realism, and pragmatism, yet remains distinct for its literary grace and disciplined naturalism. Santayana's method is both destructive and reconstructive, clearing away false certainties while grounding knowledge in embodied life. Santayana, the Spanish-born philosopher, essayist, and man of letters long associated with Harvard, wrote from a singular vantage point between American pragmatism and European philosophical traditions. His lifelong concern with reason, spirit, and the limits of human knowledge informs this work profoundly. A detached critic of modern intellectual fashions, he sought a philosophy adequate to both scientific understanding and the tragic, instinctive conditions of human existence. This is a rewarding book for readers of philosophy, intellectual history, and literary prose alike. It will especially appeal to those interested in scepticism, epistemology, and naturalism, offering not only arguments of lasting importance but also a model of philosophical writing at once severe, humane, and beautifully composed.