Stanford Encyclopedia of Philosophy: Karl Popper - Entry from the Encyclopedia contains a broad assessment of the most important themes in his work. Karl Popper Links and Resources - Quotes and extensively annotated links relating to the philosopher. Part of Lachlan Cranswick's personal homepage. Sir Karl Popper (1902-1994) - A brief article on this thinker, discussing the relation of Popper to the Friesian school of Kantian philosophy. The Ethical Roots of Karl Popper's Epistemology - Paper by Mariano Artigas. A detailed study of the underlying motivations for Popper's approach to epistemological problems. Critical Cafe - Yahoo! group devoted to discussing the philosophy of Karl Popper. Japan Popper Society - Brief biographical information, as well as history of the organization, its newsletters, and related links. Karl Popper Web - Dedicated to the defense of science and the exploration of this philosopher's works.