The following test is pretty old (1999) but "measures" your level of Machiavellianism - which the masses would call "your level of evil" as Machiavelli's work has been distorted.
http://www.salon.com/books/it/1999/0...est/index.html
I scored a humbling 85 (You are a high Mach, you endorse Machiavelli's opinions).
I expected a little more, but hey - I don't work for the government.