This document discusses leadership and power in organizations. It defines leadership as the ability to influence others towards goals. Early leadership studies examined styles and their impacts. Leadership theories developed from the Great Man Theory to situational and path-goal theories. Power refers to one's ability to influence others, which comes from formal position, personal attributes, and political skills. Power can result in commitment, compliance, or resistance, depending on the source and tactics used. Leaders must build and maintain power through decision processes, coalitions, and strategic positioning. Power can be lost due to changes in circumstances or poor reputation.