of society. Money originates from a credit relation between market agents, thus spot payments re­ place intertemporal exchange. Problems of low trust and information in mutual economic relations are projected onto the money medium in a monetary economy, thereby enhancing its efficiency and dynamics. The rate of interest is not related to time; it is the price for maintaining the agents' solvency in the current period, and it determines a positive rate of return on capital and production. Secondly, the book shows that network externalities in the use of money led to monopoly solutions in the national and hegemonic leader-follower relations in the international economy.