the German sociologist Robert Michels called it the iron law of oligarchy. The internal logic of oligarchies, and in fact of all hierarchical organizations, is that, argued Michels, they will reproduce themselves not only when the same group is in power, but even when an entirely new group takes control. What Michels did not anticipate perhaps was an echo of Karl Marx’s remark that history repeats itself—the first time as tragedy, the second time as farce.