Political science is considered a science because it isn't just "let's talk politics" or "debate this thing out" like many people think it is. There's a lot of science behind the strategy and thinking for politicians, and how to lead. It is considered a social science, with the analysis of political activity and systems of government.
Joseph Goldhagens article on the holocaust. You could read a memoir of an SS officer called the death dealer the ss officer was the commander of aushwitz