In 1950, Aybar was pardoned and began practicing law in Istanbul. He continued his activist writings and began participating in protests against the government, leading to his second arrest. After his release from prison in 1962, he became the first leader of the Workers' Party of Turkey. It was only after he ascended to party leadership that intellectuals began to take the party seriously. Aybar's credibility drew academics to the party As the leader of the party, he and his associates were responsible for the direction and success of the party. One of the primary tenets of the party was to resist Turkey's subservience to American influence. Aybar personally opposed the Soviet Union's invasion of Czechoslovakia and this caused disputes in the party. In 1971 he resigned from TİP as a result of his ideological split with party leadership over the Czechoslovakia issue. In 1975 he founded Socialist Party (later called Socialist Revolution Party). This party was closed by the military coup in 1980. Aybar was also a member of the International War Crimes Tribunal which was founded by Bertrand Russell. Mehmet Ali Aybar was born in Istanbul and died on 10 July 1995 in İstanbul.