International law has traditionally been neutral towards democracy and the democratic legitimacy of governments, as it was considered as internal matter of states. The situation began to change at the beginning of the 90s when, after the end of the Cold War and the collapse of the USSR, tendencies appeared to modify the rules of democracy also through international law. The democratic boom in this area peaked in the 1990s and lasted approximately 30 years. However, due to various factual reasons, such efforts were not successful, and the rules of democracy are currently still reflected through and on the basis of electoral human rights (the right to vote and right to be elected) anchored in several post-war conventions on the human rights. In addition, the so-called electoral democracies begin to gradually erode and deviate from democratic rules and processes to varying extents and intensities. The beginning of the new millennium is characterized by the growth of authoritarian regimes and ideologies in the world and overall weakening of democracy. Currently, it is difficult to predict the time and extent of such a recession. Unlike general international law, democracy has gained a stronger position in the regional organizations and regional international law. Some of them consider the fulfilment of democratic rules as a condition of accession of a new state as their membership. The UN plays an important role in the support of democracy in member states. This is primarily about technical and other tools supporting democratic elections, collective pro-democratic interventions in member states, as well as UN General Assembly decisions on democratic nature of governments through the process of credentials acceptation in the UN General Assembly. Finally, the existence of democratic principles can also be found in the treaties of the European Union with third parties (states and international organizations), International practice confirms that democratic criteria are also taken into account when recognizing new states and governments in the context of the third wave of democratization.