People of the Revolution and the USSR

Netherlands state institutions Left critics of Bolshevism 1873–1960 ○ Natural causes

The astrophysicist who mapped the Milky Way, and the council communist Lenin attacked in 'Left-Wing Communism'

One summer night in Bremen, 1908 — after teaching a workers' class — Pannekoek went out with his telescope. His verbal descriptions of the Milky Way clouds, notebook after notebook, would later become the evidence that let stellar statisticians first gauge the distance to our galaxy's spiral arms.

Dutch astronomer and founder of council communism. He won the RAS Gold Medal for his work on stellar atmospheres and galactic structure. In the Dutch and German left he built the theory of workers' council revolution, becoming the principal target of Lenin's 'Left-Wing Communism'.

Comintern Left critics of Bolshevism 1885–1939 ✕ Killed in prison

The polemicist who survived trial only to die in prison

"Do you know the difference between Stalin and Moses? Moses led the Jews out of Egypt, but Comrade Stalin led them out of the Politburo." — Radek to Boris Bazhanov, after Trotsky and Zinoviev were expelled from the Politburo.

A Polish-born Jewish journalist and diplomat who moved between the international social-democratic and communist movements. A close associate of Lenin, he participated in the Brest-Litovsk negotiations and the founding of the Comintern, serving on the Bolshevik Central Committee and as Comintern secretary. Renowned for his sharp polemics and biting wit, he led the Left Opposition before recanting publicly in 1930 and rejoining the Party. During the Great Purge he became the central defendant at the Second Moscow Trial, delivering theatrical confessions that earned him a 10-year sentence; in 1939 he was killed in prison on Stalin's orders.