The subject of this thesis is a detailed mapping transformation Baltic States after 1991, and their coexistence with the Russian minority in Latvia. The work seeks to analyze and describe the specific case situation that took place after 1991. The work deals with the development of Latvia, the Russian minority status and the introduction of controversial laws on citizenship. Tries to find answers to questions about what led Latvia to the strict laws on citizenship. The work shows, that the main reason is the big Russian minority in these countries, which is considered like a threat to the political independence of the Baltic states. The first part is focused on the characteristics of minorities, showing different perspectives on the history and mapping of the Baltic States. The second part details the progress, that affect a very strained relationship between Latvians and the Russian minority, which led to the introduction of strict rules for obtaining citizenship in Latvia.