Richard H. Popkin was a prominent philosopher and professor who specialized in the history of enlightenment philosophy and early modern antidogmatism. Among his honors, Popkin was awarded the Nicholas Murray Butler Medal by Columbia University and was a fellow of the American Academy of Arts and Sciences. He was the president emeritus and founding editor of theJournal of the History of Philosophy. Avrum Stroll was a distinguished philosopher and a noted scholar in the fields of epistemology, the philosophy of language, and twentieth-century analytic philosophy.