Pharmakon traces the emergence of an ethical discourse in ancient Greece, one centered on states of psychological ecstasy. In the dialogues of Plato, philosophy is itself characterized as a pharmakon, one superior to a large number of rival occupations, each of which laid claim to their powers being derived from, connected with, or likened to, a pharmakon. Accessible yet erudite, Pharmakon is one of the most comprehensive examinations of the place of intoxicants in ancient thought yet written.