One practical point many experts will attest to is that if you want to develop someone as a leader, give them lots of responsibility early in their lives and careers. The military does that. I can remember being officer of the deck on a destroyer, on watch and in charge at two in the morning as we plowed through the Mediterranean while 300 shipmates slept below decks. I was 25 at the time. I don't know how much of a leader I ever became, but the experience certainly brought home to me a sense of responsibility for others.