He survived, but in the 40 years of writing which followed persisted in asking what he had survived as. This was not a merely personal question about the damage done to him and, even more, by him; he wrote with pained honesty about the shifts to which he was put to eke out those sparse days - the petty thefts, the bamboozling of less adept prisoners, all manner of connivance to ensure that he should be, as far as possible, first in any line that might sustain his life. He was ashamed of himself, but also, as he said in 1955, ashamed to belong "to the same species that had built Auschwitz". He had an unusually keen sense of what Marx called "species-being", of that human solidarity which the Bible expresses by saying that we are all descended from common parents. So the question Se questo asks the reader about Levi is also one the book asks each reader: what is left of your humanity?