If you look at behavioural genetics and twin studies, you will see that leadership is genetic. It requires a sort of emotional distance from others to be effective.

In the mammal kingdom, one out of ever twenty of the species has the brain chemistry of a leader. The rest are followers.

One cannot teach someone who is a follower to be a leader.

Leadership also requires someone to be an independent thinker, to be able to work out, intellectually, what the dangers are, and to prepare a plan to counter them. In today's world, that takes vast intelligence. Again, intelligence is genetic. It's not something that can be taught.

Lastly, confidence is what develops as a result of being able to do something or accomplish something. One doesn't do something because one is confident. Confident people got that way becausee long before you met them, they were able to do things...