Daniel W. Graham, Ph.D., has taught ancient Greek philosophy for forty years, first at Grinnell College, then at Rice University, and for most of his career at Brigham Young University, where he has been department chair and is now Abraham Owen Smoot Professor of Philosophy emeritus. He has been a visiting fellow at Clare Hall, Cambridge University, and a visiting professor at Yale University. The recipient of two NEH fellowships, he has published nine books (in eleven volumes) with leading academic presses, one of which was named one of the best books of 2010 in the Times Literary Supplement, and authored over one hundred scholarly articles in journals of philosophy, classics, history of ideas, and history of science. He does research in eight languages, has lectured around the world, and is past president of the International Association for Presocratic Studies. Having traveled to most of the major Greek archaeological sites of Greece as well as of Italy and Turkey (where Greek colonies abounded), he recently visited two remote battlefield sites in Greece, Potidaea and Amphipolis, where Socrates fought as a citizen soldier.