Leadership has been described as the “process of social influence in which one person is able to enlist the aid and support of others in the accomplishment of a common task” . A definition more inclusive of followers comes from Alan Keith of Genentech who said "Leadership is ultimately about creating a way for people to contribute to making something extraordinary happen. Students of leadership have produced theories involving traits ,styles and behaviors, power, situational interaction, vision and values , charisma, and intelligence among others.