"One of the most valuable books on the relation of philosophy and science which has appeared for many years." — The Cambridge Review "A great contribution to Natur-philosophie, far the finest contribution . . . made by any one man. — Mind In addition to his brilliant achievements in theoretical mathematics, Alfred North Whitehead exercised an extensive knowledge of philosophy and literature that informs and elevates all of his works. This book represents one of his most significant achievements in the field of natural philosophy. The Concept of Nature originated with Whitehead's Tarner Lectures, and it offers undergraduate students and other readers an absorbing exploration of the fundamental problems of substance, space, and time. Whitehead's discussions are highlighted by a criticism of Einstein's method of interpreting results, and by his alternative development of the celebrated theory of the four-dimensional space-time manifold.