Trofim Lysenko

In 1940, Lysenko became director of the Institute of Genetics of the Soviet Academy of Sciences, and he used his political influence and power to suppress dissenting opinions and discredit, marginalize, and imprison his critics, elevating his anti-Mendelian theories to state-sanctioned doctrine.
Soviet scientists who refused to renounce genetics were dismissed from their posts and left destitute. Hundreds if not thousands of others were imprisoned. Several were sentenced to death as enemies of the state, including the botanist Nikolai Vavilov, whose sentence was commuted to prison. Lysenko's ideas and practices contributed to the famines that killed millions of Soviet people; the adoption of his methods from 1958 in the People's Republic of China had similarly calamitous results, contributing to the Great Chinese Famine of 1959 to 1961. Provided by Wikipedia