Zhores Medvedev, a molecular biologist and historian of Soviet genetics, challenged state control over scientific information. His history of Soviet genetics was withheld by censors in 1962, and his writings on postal censorship and scientific secrecy circulated among Soviet researchers. After publishing those works and other dissident material, he was arrested in May 1970 and forcibly confined in the Kaluga psychiatric hospital. Protests by scientists including Andrei Sakharov, Pyotr Kapitsa, Igor Tamm, and Nikolai Semyonov, along with prominent writers, helped secure his release. The episode illustrated the use of psychiatric detention and institutional censorship to suppress scientific dissent rather than debate it openly.
Medvedev also documented the Soviet Union’s concealed Kyshtym nuclear disaster. His 1977 book Hazards of Nuclear Power referred to the event, which was still largely unknown and dismissed by some Western colleagues as propaganda. In Soviet Science (1978) and The Nuclear Disaster in the Urals (1979), he assembled evidence from Soviet publications to establish that the disaster had occurred; his later 1990 work The Legacy of Chernobyl argued that Kyshtym and Chernobyl reflected the same systemic disregard for transparency and safety. In August 1973, Soviet authorities confiscated his passport and stripped him of citizenship while he was working in Britain, where he continued his research until 1991.
