The fragments and testimonia of the early Greek philosophers (often known as the pre-Socratics) have always been not only a fundamental source for understanding archaic Greek culture and ancient philosophy but also a perennially fresh resource that has stimulated Western thought until the present day. This new systematic conception and presentation of the evidence differs in three ways from Hermann Diels s groundbreaking late-nineteenth-century work as well as from later editions: it renders explicit the material s thematic organization; it includes a selection from such related bodies of...