This is true because in order to have a strong organization, there needs to be a strong leader with the ability to guide a group to the achievement of goals. The universalist theory looks for characteristics common in all effective leaders whereas the behavioral theories look at behaviors common in effective leaders.
Contingency theory looks at characteristics involving both leaders and situations.
This link gives examples of leadership functions to match shared leadership with the intent of creating a vision, fostering commitment, and helping others exert influence. This link defines leadership, provides keys to effective leadership, and talks about how leadership can provide motivation. This link is to a consulting firm that works with large corporations, schools, and universities to help create strong leadership skills. This link talks about different styles of leadership and how some styles may be more effective than others.