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During the first three months of 1917, Marxist revolutionary Leon Trotsky lived in a working-class tenement in The Bronx. He wrote for the socialist literary magazine Novy Mir and was active in local politics.

Though Trotsky's stay in New York was brief, he made had a lasting impact on the American left. Kenneth Ackerman, author of "Trotsky in New York 1917: A Radical On The Eve of Revolution," explains. Click on the 'Listen' button above to hear our full conversation.