We all choose our leaders. We hire them to run our companies. We vote them into office. We appoint them to committees. We decide to work for, serve, and follow them. In fact, all leadership is relative; by taking direction or orders, going to bat or war, marching behind, listening, and agreeing, we are choosing to allow another individual to lead us. Whether the stage is a corporation, a country, a club, a school, or any other organization, effective leaders matter. Yet despite such high-profile examples of leadership disasters--from the California recall of Gray Davis to the fall of such...