Like Bohr, Einstein and Heisenberg, Wolfgang Pauli was notonly a Nobel laureate and one of the creators of modernphysics, but also an eminent philosopher of modern science. This is the first book in English to include all his famousarticles on physics and epistemology. They were actuallytranslated during Pauli’s lifetime by R. Schlapp and are nowedited and annotated by Pauli’s former assistant Ch. Enz. Pauli writes about the philosophical significance ofcomplementarity, about space, time and causality, symmetryand the exclusion principle, but also about therole of theunconscious in modern science. His famous article on Kepleris included as well as many historical essays on Bohr, Ehrenfest, and Einstein as well as on the influence of theunconscious on scientific theories. The book addresses not only physicists, philosophers andhistorians of science, but also the general public.