“A manager is able to use authority or the right to convince others to do things by virtue of his or her positional power. While a leader leads through the ability to influence other people to do things using some degree of personal power or charisma” (McLean, 2005, p. 16). By definition, leadership is about influence. Therefore, it is impossible to discuss the topic of leadership without including followers or try to explain the idea of ​​team building without explaining the influence of a leader. Although each concept is unique, both have a direct effect on the other. A leader is not a leader without someone following him and a team will always develop a leader, whether appointed indirectly or directly. However, leadership and team building are very much a preverbal chicken and egg; and many theories have developed over several years trying to explain the mutual influence and positive development of teams and leaders. While it is clear that leadership is about influencing others, what has been the subject of theoretical debate has been what creates a leader. Is a leader born, learned or is it a matter of circumstances? Perhaps, better yet, since leadership is about influence, then leadership is about relationships. Although many leadership theories exist, three theories purport to explain leadership development: trait theories, behavioral theories, and relationship theories. Trait theorists believe that leaders are born that way and that leadership is part of an individual's DNA. In the 19th century, Thomas Carlyle, a historian proposed the “great man theory” based on his research on many great men such as Gandhi, Lincoln and Alexander the Great. He believed these men were destined... middle of paper......rom http://web.b.ebscohost.com.ezproxy2.apus.edu/ehost/pdfviewer/pdfviewer?vid=5&sid =44c29a95-3188 -4c64-9038-d11f6e77a39e%40sessionmgr114&hid=108McLean, J. (2005). Management and leadership: debunking the myths. British Journal of Administrative Management, 9(1), 16-17. Retrieved from http://web.ebscohost.com.ezproxy2.apus.edu/ehost/pdfviewer/pdfviewer?vid=20&sid=5c780ccf-104d-49c6-9368-db4615f766bd%40sessionmgr113&hid=108Nickels, D.W., Parris, J.B., Gossett, C. H. and Alexander, A. (2010). Developing collaboration skills: A mixed-temperament approach to teamwork. Journal of Business Studies, 2(2), 101-116. Retrieved from http://web.ebscohost.com.ezproxy2.apus.edu/ehost/pdfviewer/pdfviewer?vid=26&sid=519c905d-9766-46a2-99b0-a06ac3146743%40sessionmgr12&hid=12Robbins, S.P., & Coulter, M. ( 2007). Management (9th ed.). Upper Saddle River, NJ: Pearson Education, Inc.