The short answer is: leadership is the ability to cause subordinates to perform a task. They may cause the subordinate to perform a task through fear or through inspiration, or through leading by example. The best leaders are able to cause subordinates to perform more or better than they believe they are capable of doing. The task may be menial or dangerous or important, a good leader will inspire his personnel to complete the task or mission. My best leaders have always led by example and from the front.