A great tragedy for the peoples and complication in the struggle for self-determination arose through the betrayal of principles by the Soviet Union headed by the Khrushchevites. While restoring capitalist exploitation and national oppression within, the Soviet Union emerged as a full-fledged social-imperialist power, contending and colluding with the US for domination over the globe. The Soviet social-imperialists proclaimed the nefarious theory of “limited sovereignty” to justify their efforts to dominate the countries of people’s democracy in Eastern Europe. In the name of opposing US imperialism, they intervened in the affairs of a number of countries in Europe, Africa and Asia. The invasions of Czechoslovakia in 1968 and of Afghanistan in 1979 showed the extent to which the rulers of the Soviet Union had departed from the principles originally laid down in that country.