How were the Greeks of the sixth century BC able to invent philosophy and tragedy? In this book Richard Seaford argues that a large part of the answer can be found in another momentous development, the invention and rapid spread of coinage, which produced the first ever thoroughly monetised society. By transforming social relations monetisation contributed to the ideas of the universe as an impersonal system, fundamental to Presocratic philosophy, and of the individual alienated from his own kin and from the gods, as found in tragedy.