The topic of writing this thesis is liberalism and its relationship to the Catholic Church, including the Catholic Church in the Republic of Croatia. I chose this topic for writing the thesis because the teaching of the Catholic Church was almost unchanged for a long time, due to the often conservative views of the popes who were at the head of the Catholic Church. However, with Pope Francis, this is no longer the case. Pope Francis introduces a lot of news in the Catholic Church in terms of more liberal attitudes on certain important issues. Liberalism is an ideology that has its own social functions, such as fulfilling the need for identity, understanding the perspective of the world, liberalism motivates action, facilitates the decision-making process, and liberalism unites people using its values. The beginning of liberalism in the world dates back to the 17th century, founded by the English philosophers Thomas Hobbes and John Locke. In Croatia, the turning point for the Church and liberalism was the democratic elections for the independent and sovereign Republic of Croatia in 1990. Croatian society then moved into liberal democracy, and socialism, which had been in force since 1945, ended. Liberalism as an ideology and worldview advocates the reduction of state control over the individual freedom of the individual. He stands for political pluralism and the introduction of liberal reforms, and the freedom of the market. Liberalism is embodied in laws. It advocates that all people can equally elect the parliament and be elected to parliament. The Catholic Church bases its positive foundations on morality, ethics and hope for the positive. The Church is looking for practical solutions related to the improvement of social life in the country.