“The ancient Roman class struggle was only fought out within a privileged minority,” wrote Karl Marx in The Eighteenth Brumaire of Louis Bonaparte, “between the free rich and the free poor, while the great productive mass of the population, the slaves, formed a purely passive pedestal for the combatants. People forget J.C.L. Simonde de Sismondi’s significant expression: the Roman proletariat lived at the expense of society, while modern society lives at the expense of the proletariat.”