How do you make a leader?

A good friend and I had an interesting discussion a while back. We were talking about the age-old argument of whether leaders are born or made. I jokingly said that I've yet to see a leader who wasn't born and he, in a similarly joking tone, said he'd never seen a leader who wasn't made.

Joking aside, we started kicking around the idea that if leadership can be developed, then there is certainly a process that can be defined for doing it.

And, I'm curious about that process. I wonder what you might think that process looks like. Now be careful as you consider an answer. I'm not just talking about a listing of skills, abilities, practices, or even principles that effective leaders have or follow. I'm not talking about character traits or personality types. I'm not even talking about leadership styles or methods of communication.

All of those are well and good, but they don't tell us how leaders develop. How do you take someone who would be defined as a "non-leader" and put them through some "mystical process" so then they would be defined as a leader? What is that "mystical process?"

I've got a few thoughts on the matter, but would be deeply interested in your opinions. Please, share!