Our post-Hannah Arendt imaginations are haunted by the wrong figure: for every owl-eyed, mild-mannered pen-pusher clinically shuffling the euphemistic paperwork of oblivion, there were a hundred noisily dedicated louts revelling in the bloodbath. The gas chambers, our most enduring symbol of the catastrophe, were in fact anomalous: most of those annihilated did not die suddenly and surprised as the result of a deception, but only after protracted humiliations and torments to whose devising their persecutors devoted inexhaustible creative zeal.