Anatoly Tikhonovich Marchenko (also Anatoli Marchenko, Anatolii Marchenko, etc.) (January 23, 1938 – December 8, 1986) was an influential and well-known Soviet dissident, author, and human rights campaigner. He was the first recipient of the Sakharov Prize for Freedom of Thought of the European Parliament, awarded to him posthumously in 1988 (the only recipient to be honoured in this manner to date). Initially a worker on a drilling gang, and not of intellectual background or upbringing, he became radicalized, and turned to writing and politics, after being imprisoned as a young man on trumped-up charges. During his time in the labour camps and prisons he studied, and began to associate with dissidents. He first became widely known through his book My Testimony, an autobiographical account of his then-recent sentence in Soviet labour camps and prison, which caused a sensation when it was released in the West in 1969, after limited circulation inside the Soviet Union as samizdat. It brought home to readers around the world, including the USSR itself, that the Soviet gulag had not ended with Stalin.
He also became active in the Soviet human rights movement. He was one of the founder members of the influential and much-emulated Moscow Helsinki Group. He organized protests and appeals, and authored a number of open letters, several of which landed him in prison again. He was continually harassed by the authorities, and was imprisoned for several different terms, spending about 20 years all told in prison and internal exile. Nathan Shcharansky said of him: "After the release of Yuri Feodorovich Orlov, he was definitely the number one Soviet prisoner of conscience." He died in Chistopol prison hospital during his last incarceration, at the age of 48, as a result of a three month long hunger strike he was conducting, the goal of which was the release of all Soviet prisoners of conscience. The widespread international outcry over his death was a major factor in finally pushing then-General Secretary Mikhail Gorbachev to authorize the large-scale release of political prisoners in 1987.