Collapse of empires: Austro-Hungarian, Ottoman, German, Russian → power vacuums, new fragile democracies.
October Revolution (1917): Directly influenced by WWI instability, leading to Bolshevik seizure of power → USSR formation.
Treaty of Versailles (1919): Redrew European borders, dismantled old monarchies.
Reservoir Conference (1944) (ties to WWII but mention as part of post-WWI shifts): Showed how colonial policy was influenced by war realities (France planning post-war control of colonies).
Immediate political restructuring in Europe: Fall of fascist regimes (Germany, Italy), occupation governments.
Population transfers: Ethnic Germans expelled from Eastern Europe (Poland, Czechoslovakia, etc.) → destabilizing political re-organization.
Allied conferences (Yalta, Potsdam): Division of Germany, setup of Cold War alliances (NATO vs. Warsaw Pact).
Reservoir Conference (1944): France reaffirmed grip on colonies → reasserting imperial control, triggering anti-colonial resistance.
War debts + reparations (esp. Germany): Massive inflation, economic collapse (1923 hyperinflation in Germany).
Global depression roots: War disrupted trade, currency, and industry → sowed seeds for 1929 crash.
Russian economy pre- and post-revolution: Economic collapse was a major cause for the October Revolution.
Great Depression aftermath still shaping war recovery: Europe devastated; infrastructure collapsed.
Marshall Plan (1948) (technically medium-term, but planned from end of war): Urgency due to economic instability.
Economic hardship in colonies: Contributed to unrest and eventual decolonization movements.
Refugee crises:
Over 10 million displaced across Europe due to trench warfare, occupation, and shifting borders.
Armenian Genocide (1915–1917): ~1.5 million Armenians killed or deported by Ottoman Empire.
Demographic impact:
Lost Generation → millions of young men dead → decline in birth rates and labor force.
Gender roles shifted: women entered workforce (munition factories, transport, hospitals).
Psychological trauma:
“Shell shock” (PTSD) in soldiers → new recognition of mental health in war contexts.
Massive population transfers (esp. 1945–1947):
~12–14 million ethnic Germans expelled from Eastern Europe (Poland, Czechoslovakia, etc.) → largest forced migration in modern European history.
Redrawing of borders (e.g., Poland moved westward) displaced millions.
Holocaust survivors:
~250,000–300,000 Jewish displaced persons (DPs) in camps post-1945, many without families or homes.
Accelerated push for a Jewish homeland → foundation of Israel (1948).
Women’s roles again transformed:
Took on industrial and military jobs ("Rosie the Riveter" era), but post-war many pushed back into domestic roles → tension → long-term women's rights movement.
Destruction of cities + homelessness:
Bombing of cities (e.g. Dresden, London, Hiroshima) left millions homeless.
Urban rebuilding became a short-term priority in occupied zones.