Socrates is the first Western philosopher to have left to posterity any sense of his individual personality, and he is a central figure in the subsequent development of philosophy. Both of these aspects are due primarily to Plato. It is via his portrayal by Plato's literary genius that Socrates is a living figure for subsequent generations, and thereby an exemplar of the ideals of philosophy, above all dedication to truth and intellectual integrity. It was under the influence of Socrates that Plato applied systematic techniques of argument pioneered by Socrates and his contemporaries, the Sophists, to the fundamental questions of human nature and conduct that primarily interested Socrates, thereby placing ethics and psychology at the center of the philosophical agenda. But while Plato brings Socrates to center stage he also hides him; because Socrates wrote nothing himself we depend on others for...