Amazon may have catapulted Jeff Bezos to a $131 billion net worth and made him the richest person alive. But in a recent forum on leadership, the billionaire says that the most important work he's doing now is actually with Blue Origin, his space company.

"You don't choose your passions, your passions choose you," he says of his commitment to space exploration. "All of us are gifted with certain passions, and the people who are lucky are the ones who get to follow those things."