On the 1st of August 1975 in Helsinki, 35 countries signed the Final Act of the CSCE. Running the Helsinki process was crucial for the institutionalization of the human rights movement in Central and Eastern Europe. For the first time the principle of respect for human rights, treated as a manifestation of European security, achieved a high status in the basic international document. Although at the beginning the conference did not have any means of direct impact on Member States, thanks to the adopted mechanisms (Review Conferences ) it became possible to international control over the observance of the principle of protection of human rights. As a result, already in 1976, the first non-governmental organizations, upholding the findings of Helsinki, were established in the USSR, Poland and Czechoslovakia,. In this way, the European communist states were subjected not only international but also internal pressure of societies. Social transformations in each of these countries have become the nucleus of the emerging civil society. The final result of, ongoing since 1973, the CSCE process in 1989, was a fall of the Iron Curtain in 1991 and end of the Yalta–Potsdam order, dividing Europe into the political sphere of influence for more than four decades.