"This volume documents a sustained conversation between two of the most important American philosophers of the twentieth century and at the same time pays homage to an enduring intellectual friendship.". "In 1922, Charles Hartshorne, then an aspiring young philosopher, wrote to Edgar Sheffield Brightman, a preeminent philosopher of religion and one of the most prolific members of the Boston School of Personalism. For twenty-three years, the two carried out an unusually rich and intensive correspondence, and remarkably, almost every letter was preserved. The letters are presented here along with additional material that follows the philosophers' lives after 1945, when Brightman's ill health prevented him from continuing the correspondence."--BOOK JACKET.