This essay delves into the reasons behind the controversy surrounding Martin Luther's 95 Theses, a pivotal document in the history of Christianity and the Protestant Reformation. It begins by providing a biographical sketch of Martin Luther, setting the stage for understanding the context of his work. The essay explores the historical background, focusing on the practices of the Catholic Church, particularly the sale of indulgences, which sparked Luther's outrage. It analyzes the key arguments presented in the 95 Theses, highlighting Luther's criticisms of the Church's authority, his emphasis on the Bible as the ultimate source of religious truth, and his belief in salvation through faith alone. The essay examines the theological and political implications of Luther's challenge, including the Church's response, the subsequent excommunication of Luther, and the rise of the Protestant Reformation. Furthermore, the essay discusses the lasting impact of the 95 Theses on religious and social landscapes, emphasizing the shift in religious authority and the empowerment of individual interpretation of the Bible. The conclusion summarizes the key points and reiterates the significance of Luther's work in shaping modern religious thought and practice.