Nationalism, according to the most widely accepted definition, is the doctrine that the state and the nation should be congruent. It involves a strong identification of a group of individuals with a political entity defined in national terms, i.e. a nation. Often, it is the belief that an ethnic group has a right to statehood, or that citizenship in a state should be limited to one ethnic group. We examine under this definition both the state-seeking activity of ethnic groups in multi-ethnic states and also the rivalries of established and more ethnically homogeneous nation-states, insofar as their leaders seek to legitimate their power and appeal for popular support for their policies by claiming to fulfill the historical mission or cultural identity of the nation.  From this point of view we can say for sure that any nationalistic theory is a part of myth about strong and united state. That myth was the basis of Nazi ideology regarded Jews and, perhaps, the basis of Ottoman ideology and Armenians. Anyhow nationalistic theory and activity is something which is not constructive. If nations living in one community can “resign” their ethnic self it will be the main point in conflict resolution. But, so far as, ethnic self of any nation is closely connected to the ethnic memory, any nation tends to create stereotypes and the leaders of that nation create the atmosphere of hatred toward another ethnic group. Such kind of conflicts is escalated very often and successfully in polyethnic states. This problem is also related to the sphere of religion. Main nationalistic conflicts have their outlet in countries with different belief. This idea can be well-applied to the example of neighboring Georgia. As a state of different ethnic groups (Swans, Cachets, Megrels, etc.) it is likely to perform an ethnic conflict such as former Yugoslavia. But, so far as, there is religious unity (most part of them are from Orthodox Church) they preserve the unity of their state. Some scholars present an idea of Serbian nationalism to be a political project i.e. an applied ideology. But any kind of nationalistic theory is an applied ideology as it was in the case of strong Germany of Hitler or from sea to sea Armenia. In both cases when we speak either about national identity or political impact, nationalistic theory should stand apart from being destructive. Nowadays humanity tries to form such kind of political structures which will unite different peoples even on different stages of development. In the beginning of 20th century on the 1/6 part of the world there was a country which united different nations with different backgrounds and different religious insights. But grace à political ideology and system they lived “happily ever after”. It was a great communist myth about well-being of all nations which seems anyhow be constructive. Later European countries create another model which is not so far from the Soviet one. Perhaps people prefer to live in community (such as EU or other) more than live separately and in conflicts.