David Graeber's final book examines how pirate communities in early modern Madagascar created proto-democratic institutions that influenced Enlightenment political thought. The anthropologist and activist, who died unexpectedly in 2020, argues that the legendary pirate utopia of Libertalia was not mere fantasy but reflects real experiments in self-governance among crews who rejected European hierarchies. Graeber traces how pirates in the Indian Ocean intermarried with Malagasy populations and developed hybrid societies that practiced forms of equality, consensus decision-making, and welfare provision that European observers found simultaneously fascinating and threatening. These pirate democracies, he argues, fed into Enlightenment debates about social contracts and natural rights through travel narratives that circulated widely in Europe. The book challenges Eurocentric histories that treat democratic ideas as purely Western innovations, showing instead how encounter with actually existing alternatives--including pirate societies--shaped what became 'Western' political thought. Graeber writes with his characteristic blend of scholarly erudition and anarchist enthusiasm, finding in the pirate Atlantic a prehistory for the democratic possibilities he spent his life advocating. The work exemplifies his method of using anthropology to denaturalize the present by revealing the contingency of social arrangements we treat as inevitable. It's a fitting capstone to a career dedicated to imagining alternatives to capitalism and the state.