The American philosophical Association (APA) was founded in 1900 to promote the exchange of ideas among philosophers and to facilitate the professional work and teaching of philosophers. Having grown from a few hundred members to over 10,000, the APA is one of the largest philosophical societies in the world and the only American philosophical society not devoted to a particular school or philosophical approach. In 1999, in anticipation of its centennial, the APA authorized philosopher Richard T. Hull to begin collecting and publishing the presidential addresses delivered over the course of the twentieth century. The first five volumes, covering the years 1901 to 1950, have now been published and are available exclusively from Prometheus Books. Besides the presidential addresses, each volume contains biographies and photographs of the APA presidents, a list of their birthplaces, a chronology of the APA, a list of presidents per decade, a list of universities and colleges closely associated with each president, and name and subject indices. A total of eleven volumes are planned to complete the collection, the final volume being devoted to historical essays in 20th-century American philosophy. This unique record of the development and leadership of American philosophy during its flowering in the twentieth century will complement the libraries of both professional philosophers and interested nonprofessionals.