Document Type : Research Paper
Associate Professor, Faculty of Public Law, College of Farabi , University of Tehran, Iran
Ph.D., Public Law, College of Farabi, University of Tehran, Iran
Religion as one of the most important components of a good life performs a special role in targeting in human life and modifying the present situation in order to achieve a better situation .Yet the role of social contexts in human life caused the thinkers to focus on the relation between society and the good life, and political ethics has classically had a responsibility in this issue and presented a result on the relationship between the state and the good life. This paper surveys the evolution of political ethics in the west, and after analyzing the Christianity's changes from medieval to contemporary era , will study the dominant political idea named neutrality of religion in regard to the state, and finally will study the critical approach called perfectionism that was revived by some Western perfectionists in the late twentieth century. This approach criticizes the plurality of ethics in the west and demands the revival of religion as a source of ethical norms and emphasizes the state's responsibility in regard to the good life.