Adolf Hitler was undoubtedly an influencer, but he was emphatically not a leader. He was a manipulator, a coercer, and a consummate extortionist, but he was not a leader. It is high time that we distinguish between tyranny and leadership. To define leadership as mere influence is to emasculate its inherent morality and disrespect the intrinsic willingness of followers.

A leader is a disrupter, a fire-starter, someone who goes around turning things right-side-up. This natural disturbance...