In 1944, when Primo Levi, one of the prisoner-slaves in Auschwitz, was sent to a laboratory by the Nazis to test his viability as a worker, he was examined by the ‘blue-eyed’ German Doktor Ingenieur Pannwitz, whose hateful gaze Levi never forgot. He noted in his memoir, Survival in Auschwitz, published in 1986, “Because that look was not one between two men; and if I had known how completely to explain the nature of that look, which came as if across the glass window of an aquarium between two beings who live in different worlds.”