with the Article Prize awarded in even years. The APA Book Prize has been won by such figures as David Kellogg Lewis, Lawrence Sklar, Bas van Fraassen, Michael Friedman, Loran Lomasky, Paul Guyer, John Cooper, Ted Sider, and Michael Smith. Another of the most distinguished prizes is the Royce Lectures in the philosophy of mind, awarded to a distinguished philosopher every four years. They have been delivered by Robert Stalnaker, Jerry Fodor, Hilary Putnam, Sydney Shoemaker, Saul Kripke, and Elizabeth Anscombe. Another such prize is the Rockefeller Prize. The Rockefeller Prize ($1000) is awarded every two years for the best unpublished article length work in philosophy by a non-academically affiliated philosopher. The winner's work will be published in the Journal of Value Inquiry at the behest of the winner and the journal. Other philosophical societies While the APA serves as the main learned society for philosophy professors in North America, many other philosophy societies have sprung up to serve as venues for philosophers to specialize. Next to the APA, the second largest philosophic society is the Society for Phenomenology and Existential Philosophy, which was created in 1962 by American philosophers who were interested in continental philosophy, some of whom were dissatisfied with the analytic approach of the APA. Since then, however, many members of SPEP have participated extensively in the APA and have also served in leadership positions, including Linda Alcoff and Edward S. Casey. References External links Official website Official Pacific Division website Official Eastern Division website Chronological list of the presidents of the divisions 1900 establishments in the United States Organizations established in 1900 American philosophy Philosophical societies in the United States