Charisma, a loosely functioning word, describes a range of human traits. It's applied to a number of historical figures who promoted the idea of their own exceptionalism. Frequently it describes a sense of an inner calm and self-possession gleaned from external physical traits. Hitler would cultivate this quality in front of the mirror and then go off to rouse up the passions of the masses. Without the new invention of the microphone he might not have succeeded. The advent of film and television and the internet, dealing in repeated visual images of people, confirms an idea that some people are essentially different. It's probably why society is so fascinated by film stars, publish their birthdays in the newspaper, swoon over them at a distance. Actors learn to refine an innate skill of looking and behaving as someone different and being convincing at it. Basically it's about being a good liar. For some people getting up in front of an audience is a fearful experience so listening to someone who sounds confident and sure of themselves buoys them up. It's just a trick. To define the true character of any individual is far more complex. After all, aren't all men created equal?