Detection of features of an event, which can formation of the national mentality be based. In recent years social issues play an increasingly important role in the politics of modern states. The global financial crisis has worsened the financial situation of many people, provoted economic migration and aggravation of ethnic conflicts. If a country wants to maintain its integrity and a peaceful environment in the society, it should pay attention to migration issues, to seek solutions to conflicts that arise and ways of addapting immigrants. If the policy of the state in national issues is short sighted or it is not paid enough attention, there will plenty of ethnic conflicts in the society. That can lead to a desintegration of the state and the civil war. As an example, we can mention the civil war in the Ukraine in 2014 and, as a consequence, the separation Donetsk and Lugansk people's republics. The government of the each country should think about the way in which to integrate heterogeneous multicultural population in a single community - nation, thus make state a strong, economically independent and able to withstand external theats. This issue is very actual nowadays and that's why I decided to tutn to the experience of a country that had faced it many years ago and had found a way which helped the state to become a single, highly developed and powerful.