Currency and Essence. A Reflection on Economy and Metaphysics in Plato’s Republic

The article inquires into the relation established in the Republic between the two meanings of ousia: property in the sense of possessions and wealth, and essence or substance. Besides the economic relations associated with loans, exchange, and interest, the paper examines the role of currency in the economy, with respect to ousia, as a means of dissociating wealth from possessions, thus achieving a degree of universality comparable to that of being itself.