People of the Revolution and the USSR

Soviet Union Soviet communism 1847–1936 ○ Natural causes

First elected Academy president who steered science through the Revolution

On 15 May 1917 the Academy held its first-ever presidential election. Karpinsky was chosen almost unanimously — the sole vote against him was his own.

Karpinsky was the first elected president of the Russian Academy of Sciences (1917–1936), a world-renowned geologist who led the institution across the divide from Imperial to Soviet power. He completed the first comprehensive geological map of European Russia, established the two-tier structure of the East European Platform, and identified the 'Karpinsky Line': a band of intensely dislocated crust across southern European Russia that became foundational to tectonics. He described the bizarre Permian shark Helicoprion, and his name endures in the mineral karpinskite, a lunar crater, and the Karpinsky Geological Institute. Elected almost unanimously in May 1917, he preserved the Academy's equipment and records through revolution and civil war, securing the institutional continuity of Soviet basic science.

Soviet Union Soviet communism 1874–1949 ○ Natural causes

Founder of Soviet public health who designed free universal healthcare (the 'Semashko model')

He made "prophylaxis is the path we follow, dispensarisation the method of solving prophylactic tasks" the defining formula of Soviet public health's primacy of prevention.

A physician and Old Bolshevik, born in Livenskoye in the Oryol Governorate to a teacher's family: his father Alexander Severinovich was a descendant of Polish nobility, his mother Maria Valentinovna a sister of Georgi Plekhanov. Arrested as a student, expelled from Moscow University and exiled home in 1897, he finished his medical degree at Kazan University in 1901. Active in the Nizhny Novgorod RSDLP committee from 1904 and a co-organiser of the 1905 Sormovo factory strike, he emigrated and in 1908-1910 was secretary of the Foreign Bureau of the RSDLP Central Committee in Paris. As People's Commissar of Health of the RSFSR from 11 July 1918 to 25 January 1930 he led epidemic control and built the 'Semashko model' of state-funded universal free healthcare, district physicians and dispensarisation; he was professor of social hygiene from 1921.

Soviet Union Soviet communism 1899–1938 ✕ Executed

The organiser who turned rocket research into a state institution

On 2 November 1937, Kleymenov was arrested after the detention of Georgy Langemak, the institute's chief engineer.

Ivan Kleymenov was a military engineer and administrator who organised the Soviet Union's early rocket work. Linking the Gas Dynamics Laboratory with the Reactive Scientific Research Institute, he helped bring research into the defence system and supported solid-propellant rockets that fed into the later Katyusha programme. The institution he built was then shattered by the Great Purge, which arrested its leading specialists and ended with Kleymenov's execution. He was fully rehabilitated in 1955 and posthumously named a Hero of Socialist Labor in 1991.

Soviet Union Soviet communism 1907–1960 ○ Natural causes

An experimental physicist who explored fission and nuclear isomerism

In 1935, studying bromine's radioactivity, he and the Kurchatov brothers and Mysovsky discovered nuclear isomerism.

Lev Rusinov was a Soviet physicist who expanded the experimental foundations of nuclear physics at the Leningrad Physico-Technical Institute. In 1939, working with Georgy Flerov, he demonstrated that uranium fission releases more than two neutrons per event, a result central to understanding the conditions for a chain reaction. He also investigated nuclear isomerism and the interaction of neutrons and gamma rays with nuclei, and after the war led reactor construction and the organization of nuclear research in Leningrad.