'Never before has there been so many and such dreadful weapons in so many irresponsible hands.' - Karl Popper, from the PrefaceAll Life is Problem Solving is a stimulating and provocative selection of Popper's writings on his main preoccupations during the last twenty-five years of his life. This collection illuminates Popper's process of working out key formulations in his theory of science, and indicates his view of the state of the world at the end of the Cold War and after the collapse of communism.