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This article is based on the research that places the discussion between political philosophy and history of thought. Author involves the following issues: the genesis, essence, and characteristics of social policy; its ultimate justification or lack thereof; the relationship between the political power and citizens, between the civil society and the state; the genesis, nature and duties of political authorities; the definition of the law, its foundations and limitations; the relations taking place between politics and religion; and, finally, what is the highest political value: liberty, equality or truth. Author examines the problem of the relations between the official Catholic teaching and theory of liberal democracy. Shows the teachings of many Popes, from Leo XIII to John Paul II. From the liberal focus on the political liberalism of John Rawls. He tries to provide an answers for following questions: Is Catholicism has its own vision of democracy or liberal democracy proposes to improve? Has the social thinking of the Church evolved in its assessment?