The Nazi regime did not begin with extermination. It began with citizenship law — the Nuremberg Laws of 1935 stripped Jews of German citizenship — then public humiliation, confiscation, and ghettos. Each step was bureaucratic, each step legal by the regime's own standards, each step a small expansion of what the German state could do to people it had decided were not really citizens. The shift to mass killing — first by mobile shooting squads, the Einsatzgruppen, in the occupied east from 1941, then by industrial gassing at six dedicated death camps from 1942 after the Wannsee Conference coordinated it — was presented to mid-level civil servants as a matter of efficiency and quotas. Two-thirds of European Jewry, six million people, was murdered. Roma, Soviet prisoners of war, disabled people, gay men, and political prisoners died alongside them, in the millions.
The Holocaust is not an aberration of modernity. It is one of modernity's possibilities. It required railways and timetables, file cabinets, IBM tabulating machines, chemistry (the Zyklon B of the gas chambers), eugenic theory, ordinary policemen, and a citizenry willing to look away — every one of which was a product of the same nineteenth and twentieth century that produced the welfare state and the public university. The genocide was not the work of a few fanatics but a vast division of labour: those who drafted the laws, those who scheduled the trains, those who ran the camps, those who inherited the emptied apartments. Hannah Arendt, watching Eichmann on trial in Jerusalem in 1961, called this the banality of evil: the genocide was administered by men who saw themselves as following orders and meeting targets, not as monsters, and who could go home to their families at night. What made it singular was not the cruelty — history is full of cruelty — but the marriage of murderous intent to bureaucratic rationality and industrial scale, the attempt to kill an entire people as an administrative project. The reckoning afterward — the Nuremberg trials, which established that 'following orders' was no defence, the 1948 Genocide Convention, the founding of the State of Israel, modern international human-rights law — was an attempt to build, retrospectively, the moral and legal architecture that should have prevented it.
The phrase 'never again' is the postwar West's foundational promise, and the legal and institutional order built on it — from the Genocide Convention to the International Criminal Court — is its scaffolding. Every subsequent genocide — Cambodia, Rwanda, Bosnia, Darfur, the catalogue is not short — has been an audit of how seriously that promise was meant, and how reliably the world recognizes the early bureaucratic steps — the registries, the disenfranchisement, the dehumanizing language — before they reach the camps. The first measures are almost never violent; that is precisely what makes them hard to oppose in time.