Alexander Dubcek (Slovak pronunciation: ['al?ksand?r 'dupt??k]; 27 November 1921 – 7 November 1992) was a Czechoslovak and Slovak politician who served as the First Secretary of the Presidium of the Central Committee of the Communist Party of Czechoslovakia (KSC) (de facto leader of Czechoslovakia) from January 1968 to April 1969.
He attempted to reform the communist government during the Prague Spring but was forced to resign following the Warsaw Pact invasion in August 1968.
During his leadership, under the slogan of "Socialism with a human face", Czechoslovakia lifted censorship on the media and liberalized Czechoslovak society, fuelling the so-called New Wave in Czechoslovak filmography.
However, he was put under pressure by Stalinist voices inside the party as well as the Soviet leadership, who disliked the direction the country was taking and feared that Czechoslovakia could loosen ties with the Soviet Union and become more westernized.
As a result, the country was invaded by the other Warsaw Pact countries on 20–21 August 1968, effectively ending the process known as the Prague Spring.
Dubcek resigned in April 1969 and was succeeded by Gustáv Husák, who initiated normalization.
Dubcek was then expelled from the Communist Party in 1970.
Later, after the overthrow of the communist regime in 1989, he was Chairman of the federal Czechoslovak parliament.
Also in 1989, the European Parliament awarded Dubcek the Sakharov Prize for Freedom of Thought.