In 6th century BC, the advanced Greek city-states were rapidly and pervasively monetized, largely through the introduction of coinage. It has been suggested that this monetization was a crucial factor in the genesis and in the preoccupations both of Presocratic philosophy and of Athenian tragedy. This chapter relates the monetization of Athens first to the development of polis festivals under the tyrants and then to the form and content of tragedy, which came into being in a polis festival of Dionysos.