For the first time Pauli's famous articles on the history and philosophy of science are completely translated into English. He writes about complementarity, space, time and causality, about symmetry and the exclusion principle, but also about the role of the unconscious in modern science. Historical essays on Bohr, Ehrenfest, and Einstein and on the history of the neutrino as well as his famous article on Kepler complete the collection. It addresses physicists, philosophers and historians of science as well as a more general public.