• Money appears as measure (in Homer, e.g. oxen) earlier than as medium of exchange, because in barter each commodity is still its own medium of exchange. But it cannot be its own or its own standard of comparison.

    Karl Marx: Money appears as measure (in Homer, e.g. oxen) earlier than as medium of exchange, because in barter each commodity is still its own medium of exchange. But it cannot be its own or its own standard of comparison.
    Karl Marx (1973). “Grundrisse: Foundations of the critique of political economy”, Vintage Books USA