William S. (Willi) Schlamm (originally Wilhelm Siegmund Schlamm, June 10, 1904 – September 1, 1978) was an Austrian-American journalist.
Schlamm was born into an upper middle class Jewish family in Przemyśl, Galicia, in the Austrian Empire. He became a Communist early in life, and when he was 16 years old was invited to the Kremlin to meet Vladimir Lenin. After completing secondary school, he became a writer with the Vienna Communist newspaper, Die Rote Fahne. He left the Communist Party in 1929 and joined the left-wing magazine Die Weltbühne in 1932.
Schlamm encouraged William F. Buckley, Jr. to found the conservative magazine, National Review, with Buckley as the sole owner. Schlamm became a senior editor but was later fired by Buckley. He then became associate editor of the John Birch Society's journal, American Opinion. After writing for conservative magazines, he returned to Europe in 1972, where he published the magazine Die Zeitbühne. He died in 1978 in Salzburg.
Schlamm is remembered for having coined the saying, "The trouble with socialism is socialism. The trouble with capitalism is capitalists."
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