Democratic Party, groups composing the New Left gradually became central players in the Democratic coalition. Protests of 1968 The protests of 1968 represented a worldwide escalation of social conflicts, predominantly characterised by popular rebellions against military, capitalist and bureaucratic elites who responded with an escalation of political repression. These protests marked a turning point for the civil rights movement in the United States which produced revolutionary movements like the Black Panther Party. The prominent civil rights leader Martin Luther King Jr. organised the "Poor People's Campaign" to address issues of economic justice, while personally showing sympathy with democratic socialism. In reaction to the Tet Offensive, protests also sparked a broad movement in opposition to the Vietnam War all over the United States and even into London, Paris, Berlin and Rome. In 1968, the International of Anarchist Federations was founded during a conference held in Carrara by the three existing European federations of France, the Italian and the Iberian Anarchist Federation as well as the Bulgarian federation in French exile. Mass socialist movements grew not only in the United States, but also in most European countries. In many other capitalist countries, struggles against dictatorships, state repression and colonisation were also marked by protests in 1968, such as the Tlatelolco massacre in Mexico City and the escalation of guerrilla warfare against the military dictatorship in Brazil. Countries governed by Communist parties saw protests against bureaucratic and military elites too. In Eastern Europe, widespread protests escalated particularly in the Prague Spring in Czechoslovakia. In response, Soviet Union occupied Czechoslovakia. The occupation was denounced by the Italian and French Communist parties and the Communist Party of Finland, but defended by the Portuguese Communist Party secretary-general Álvaro Cunhal the Communist Party of Luxembourg and conservative factions of the Communist Party of Greece. In the Chinese Cultural Revolution, a socio-political youth movement mobilised against "bourgeois" elements which were seen to be infiltrating the government and society at large, aiming to restore capitalism. This movement motivated Maoism-inspired movements around the world in the context of the Sino-Soviet split. Late 20th century In the 1960s, a socialist tendency within the Latin American Catholic church appeared and was known as liberation theology It motivated the Colombian priest Camilo Torres Restrepo to enter the ELN guerrilla. In Chile, Salvador Allende, a physician and candidate for the Socialist Party of Chile, was elected president in 1970. In 1973, his government was