nThe 1920s were profoundly shaped by World War I and by movements well underway before the war.
nThree major patterns
emerged:
nfirst, western Europe recovered from the war only incompletely;
nsecond, the United States and Japan rose as giants in industrial production;
nthird, revolutions of lasting consequence shook Mexico, Russia, and China.
nEach of these developments brought into doubt western Europe’s assumptions about its place as the dominant global power.