This research aims to analyze the United Nations (UN) and its role in protecting the rights of minorities. In order to find a response to this issue, the following general objective was formulated: to define what the measures are and whether there is application and effectiveness of the policies taken by the UN (United Nations Organization) in defense of minorities. This from an international perspective, given the many ideological, political and cultural differences. The specific objectives are: a) to conceptualize what is considered to be a minority, and to identify which ones they are, what their legal situation is and whether there are threats to freedoms in the territories in which they are found; b) to narrate the historical evolution of the UN and what its structure is for promoting policies aimed at protecting human and minority rights; c) to elucidate whether the commitments made by countries to the UN for the defense of human and minority rights are applied effectively in the domestic sphere. In order to achieve the objectives, the research has a qualitative, theoretical approach, using bibliographical research, treaties and international legislation.