Friedrich Adler
From Legacyview Dictionary of Biography
(1879-1960)
Secretary of the Austrian Social Democratic Party from 1911 to 1916, when he assassinated the Austrian premier. Freed from prison by the 1918 revolution, he was a founder of the Two-and-a-Half International, which he led back into the Second International in 1923, becoming secretary of the combined body.
Source: Marxists Internet Archive

