How did World War II change attitudes toward European unity?

World War II fundamentally shifted attitudes toward European unity by transforming it from a philosophical ideal into a perceived necessity for survival and peace. Having witnessed the devastation of the conflict, European leaders and activists sought to prevent future wars—particularly between France and Germany—by replacing nationalistic competition with economic and political integration.123

This shift manifested in several key ways:

• Reconciliation and Security: The primary motivation was to foster lasting reconciliation and ensure military security by binding former enemies together through shared institutions.23
• Economic Integration: Leaders like Jean Monnet and Robert Schuman proposed pooling essential resources, such as coal and steel, to make war between member states materially impossible. This led to the 1951 Treaty of Paris and the creation of the European Coal and Steel Community.1342
• Supranational Governance: Postwar constitutions in countries like France, Italy, and West Germany began to explicitly envisage limiting national sovereignty in favor of a united Europe.1
• Global Standing: Many Europeans recognized that individual nations were increasingly dwarfed by superpowers like the United States and the Soviet Union, viewing greater cohesiveness as the only path to maintaining political and economic influence.1

Ultimately, these efforts evolved from limited economic cooperation into the European Union, reflecting a profound commitment to collective peace and stability.21