Leadership has been studied and defined since the beginning of time. Throughout history, leadership theory has been characterized by the idea that leaders were great, courageous men and sources of authority and justice (Marseille). However, leadership theories have changed over time and new ones have been developed. Similarly, nowadays, a leader's leadership style is defined as the way a leader approaches action towards followers to accomplish a mission. Despite the fact that leadership styles are vital, it is concluded that the essence of leadership is actually an individual's personality and what provides the motivation, purpose and direction to effectively lead towards results. Personality types are known to be important in leadership because they help a leader develop followers accordingly, make valuable and timely decisions, and have a different perspective to get a job done. Personality shapes leadership and therefore also leadership styles. Without personality, leadership styles would not exist. Personality types provide the basis for leadership development, style, and the foundation for qualities needed for any leadership position. It is known that there are many personality tests that attempt to divide individuals into certain categories, or personality types, and are also believed to include many qualities that help shape leadership. Although most of these personality tests do not fully satisfy or fail to accurately establish an individual's personality type, due to the complexity of human nature, it is necessary to understand the importance of personality in leadership. Understanding personality depends only on the individual's introspection, his approach... middle of paper... Followers? an explanation based on the management of uncertainty." Why does leader integrity matter to followers? an explanation based on the management of uncertainty 5.2 (2009): n. pag. Web. 16 June 2014.Mullane, Susan P. "Ethics and Leadership." Ethics and Leadership (2009): Web page no. June 17, 2014. "My MBTI Personality Type - MBTI Basics: Does Personality Matter?" Leadership Success: Does Personality Matter? (nd): n. page Web. June 16, 2014."Using the Myers-Briggs Type Indicator (MBTI) in Teaching Leadership Skills." Medical Education 34.11 (2000): 956. Myers Briggs Type Indicator (MBTI), June 20 2014. .