Mass socialist or communist movements grew not only in the United States , but also in most European countries . The most spectacular manifestation of this were the May 1968 protests in France in which students linked up with strikes of up to ten million workers and for a few days the movement seemed capable of overthrowing the government . In many other capitalist countries , struggles against dictatorships , state repression and colonisation were also marked by protests in 1968 , such as the beginning of the Troubles in Northern Ireland , the Tlatelolco massacre in Mexico City and the escalation of guerrilla warfare against the military dictatorship in Brazil . Countries governed by Marxist – Leninist parties had protests against bureaucratic and military elites . In Eastern Europe , there were widespread protests that escalated particularly in the Prague Spring in Czechoslovakia . In response , the Soviet Union occupied Czechoslovakia , but the occupation was denounced by the Italian and French communist parties and the Communist Party of Finland
Tlatelolco massacre
Tlatelolco massacre
Democratic socialism