Many schools of thought have developed throughout history that propose various theories about the source and development of leaders, how leaders are discovered, and how they can be identified. Early leadership theories focused on the qualities that distinguished leaders from followers; subsequent theories looked at other variables such as situational factors and skill levels. Evaluate the similarities and differences between two approaches or theories of leadership: the trait approach and behavioral theory; the Situational Leadership® Model and authentic leadership theory; or the transformational and transactional leadership theories. Begin by providing a brief summary of the two approaches or theories of leadership you have chosen to analyze. Then, examine the common characteristics and differences between the two approaches or theories you selected. Use a minimum of two scholarly sources to support your post. Cite your sources according to APA style.