The 1919 Treaty of Versailles, intended to secure lasting peace, instead planted the seeds of World War II through seven interconnected failures:
Nationalism, imperialism, militarism, alliance systems — untouched. New borders created new grievances (Sudeten Germans, Danzig, South Tyrol, Hungarian minorities).
Collapse of Austro-Hungarian, Ottoman, Russian empires created fragile new states (Czechoslovakia, Yugoslavia, Poland, Baltic) with contested borders and minority populations.
Reparations → hyperinflation (1923) → Great Depression (1929) → mass unemployment → radicalization. Weimar democracy discredited.
Nazis exploited Versailles as "stab in the back" (Dolchstoßlegende). Hitler's entire platform: overturn Versailles, reclaim lost lands, restore pride.
League of Nations lacked enforcement (no US, no army). Manchuria (1931), Ethiopia (1935), Rhineland (1936), Austria (1938), Czechoslovakia (1938–39) — each unopposed.
France wanted enforcement; UK wanted revision; US withdrew. No coherent policy to contain revisionism.
Versailles was a punitive peace without reconciliation. It created a resentful revisionist power (Germany) and a fragile order that collapsed under the weight of its own contradictions.