Thomas Mann said this quote
“ [Men] act in response to an outward situation, and on being presented with an opportunity to conform to a pattern. If the pattern gives licence to cruelty, so much the better. They take advantage of the licence so thoughtlessly, so thoroughly, that it becomes perfectly clear: the generality of mankind are only waiting for the chance, only waiting for outward circumstance to sanction brutality and allow them to be cruel and brutal to their heart's content. ”