Do you consider yourself a shrewd manipulator? Are you cynical about the nature of human beings? If so, you might rank highly in Machiavellianism - a personality trait that's based on the writing and views of Niccolo Machiavelli, the 16th-century Italian political philosopher. We look at what makes a Machiavellian personality, and how it fits into the so called ‘dark triad’ of traits.