The importance of the topic of the Universal Declaration of Human Rights of 1948 is that countries of the world and international governmental and non-governmental organizations take this Declaration into consideration when dealing with human rights, from developing policies to evaluating the impact resulting from their implementation. Research ideas in this field raise several questions in terms of the historical roots of this declaration? Do its rules take the place of the customary rules upon which the conscience of nations has settled, even if it did not stipulate them in the form of an international treaty and stated it in a mere declaration? Is the Declaration the only instrument that represents international human rights law or the International Bill of Human Rights? Are the rights and freedoms mentioned in the Declaration applied in a similar manner in all countries of the world, or do the application and its mechanisms differ according to cultural relativism in which the historical, cultural, social and civil roots of the rights and freedoms mentioned in the Declaration are respected in the society in which they are to be applied? That is, are rights and freedoms universal or relative, and of a special nature linked to the society in which they are applied? What is the difference between the rules of international human rights law, to which the Universal Declaration of Human Rights belongs, and the rules of international humanitarian law? Does the scope of application of the Declaration stop when the provisions of international humanitarian law are applied? Are the rules contained in the Declaration of rights and freedoms binding on states, or are they emergency? Do the countries that signed the declaration adhere to it, or does its effect extend to all countries? Even if they are not signed, they are considered legitimate rules that concern the interest of the entire international community. Or are they customary international rules. These previous questions show us how important the subject of the Universal Declaration of Human Rights is.