Of mixed Russian and Ukrainian heritage, Gorbachev was born in Privolnoye, Stavropol Krai, to a poor peasant family. Growing up under the rule of Joseph Stalin, in his youth he operated combine harvesters on a collective farm before joining the Communist Party, which then governed the Soviet Union as a one-party state according to Marxist–Leninist doctrine. While studying at Moscow State University, he married fellow student Raisa Titarenko in 1953 prior to receiving his law degree in 1955. Moving to Stavropol, he worked for the Komsomol youth organization and, after Stalin's death, became a keen proponent of the de-Stalinization reforms of Soviet leader Nikita Khrushchev. He was appointed the First Party Secretary of the Stavropol Regional Committee in 1970, in which position he oversaw construction of the Great Stavropol Canal. In 1978 he returned to Moscow to become a Secretary of the party's Central Committee and in 1979 joined its governing Politburo. Within three years of the death of Soviet leader Leonid Brezhnev, following the brief regimes of Yuri Andropov and Konstantin Chernenko, the Politburo elected Gorbachev as General Secretary, the "de facto" head of government, in 1985.