This paper explores key theories of governance, including agency theory, stakeholder theory, resource-dependence theory, and stewardship theory. It examines the contribution of stewardship theory to effective organizational governance in both non-profit and for-profit organizations. The paper also analyzes the relationship between a leader's values and beliefs and effective governance, highlighting essential leadership qualities for good governance. Through a comparative analysis of these theories and their practical applications, the paper provides insights into the complexities of organizational governance and the crucial role of leadership in achieving organizational effectiveness.