 In the view of Richard Seaford, the introduction of coinage to Greece and the theorizing about value it provoked was concomitant with and even contributed to the creation of Greek metaphysics.Plato criticizes common currency as "polluting", but also says that the guardians of his ideal republic should have divine gold and silver money from the gods always present in their souls.This Platonic "money in the soul" holds the promise of "divinity, homogeneity, unchanging permanence, self-sufficiency, invisibility."