Bryan McAllister’s personal reference notebook
September 11, 2026Short & citedBlog
Civic Viewpoint.
A quiet encyclopedia with a personal desk
Kept by Bryan McAllister — short guides, clear facts, and the Canadian angle when it matters.
Civic Brief • Revolutionary

Leon Trotsky

Leon Trotsky was a Russian revolutionary, Marxist theorist, and Soviet politician who played a leading role in the Russian Revolution of 1917 and the early Soviet state.

Updated September 11, 20261 min readCited sources

Leon Trotsky was a Russian revolutionary, Marxist theorist, and Soviet politician who helped lead the 1917 Russian Revolution and later founded the Red Army. He was exiled by Joseph Stalin and assassinated in Mexico in 1940.

What it is

Trotsky was a key Bolshevik leader who served as commissar of foreign affairs (1917–1918) and commissar of war (1918–1924). He organized the Red Army during the Russian Civil War and developed the theory of permanent revolution, which became the basis for Trotskyism.

Why it matters

Trotsky’s ideas and political legacy influenced socialist movements worldwide, including in Canada. His conflict with Stalin shaped the course of Soviet history and left a lasting mark on leftist debates about revolution, democracy, and state power.

Key details

After Lenin’s death in 1924, Trotsky lost a power struggle to Stalin, was expelled from the Soviet Union in 1929, and lived in exile in Mexico. He was assassinated in 1940 by Ramón Mercader, a Stalinist agent. His theory of permanent revolution remains a core part of Marxist thought.

In short

  • Trotsky was a central figure in the 1917 Russian Revolution and early Soviet government.
  • He founded and led the Red Army during the Russian Civil War.
  • He was exiled after losing to Stalin and later assassinated in Mexico.
  • His ideas, known as Trotskyism, continue to influence leftist politics.
Canadian angle

Trotsky is relevant to Canadian readers through the history of socialist, communist, and anti-Stalinist political movements, as well as twentieth-century leftist intellectual debates in Canada.

Quick questions

Who was Leon Trotsky?
Leon Trotsky was a Russian revolutionary, Marxist theorist, and Soviet political leader who helped lead the 1917 revolution and the early Soviet state.
Why was Trotsky exiled?
He lost a power struggle with Joseph Stalin after Lenin’s death and was removed from Soviet politics before being exiled in 1929.
How did Trotsky die?
He was assassinated in Mexico in 1940 by Ramón Mercader, acting on Stalin’s orders.

Sources

  1. Encyclopaedia Britannica — https://www.britannica.com/biography/Leon-Trotsky
    Supports: Birth, death, roles in Soviet government, exile, and broad biography.
  2. BBC History — https://www.bbc.co.uk/history/historic_figures/trotsky_leon.shtml
    Supports: Trotsky’s political importance, exile, and assassination.
  3. United States Holocaust Memorial Museum — https://encyclopedia.ushmm.org/content/en/article/leon-trotsky
    Supports: Trotsky’s exile, opposition to Stalin and Hitler, and murder in Mexico.