David Graeber, an anthropologist and activist, upends conventional stories about money's origins. Economists typically describe barter economies giving way to currency for convenience. Graeber shows that credit and debt came first: ancient societies ran on complex systems of obligation long before coins were minted. He traces how human economies functioned before markets, examining the moral frameworks that governed exchange and obligation across cultures. The book moves through five thousand years of history, examining how slavery, tribute, and commercial society transformed relationships of debt. Graeber is particularly interested in how violence enforces certain kinds of economic relationships while others depend on trust and reputation. His narrative connects ancient Mesopotamia to medieval Islam to European colonialism to today's financial crises. The book is polemical as well as scholarly; Graeber writes as a participant in movements for debt forgiveness and economic justice. For readers interested in economic history, anthropology, or alternatives to prevailing economic arrangements, Graeber provides both information and provocation.