Late Modern Period 1900–1945

The 20th century opened with Europe at an apex of wealth and power, and with much of the world under its direct colonial control or its indirect domination. Much of the rest of the world was influenced by heavily Europeanized nations: the United States and Japan. As the century unfolded, however, the global system dominated by rival powers was subjected to severe strains, and ultimately seemed to yield to a more fluid structure of independent nations organized on Western models. But soon it appeared that the global system dominated by rival powers yielded to a system dominated by one power, a system organized like Eastern rather than Western models.

This transformation was catalysed by wars of unparalleled scope and devastation. World War I destroyed many of Europe's empires and monarchies, and weakened Britain and France. In its aftermath, powerful ideologies arose. The Russian Revolution of 1917 created the first communist state, while the 1920s and 1930s saw militaristic fascist dictatorships gain control in Italy, Germany, Spain and elsewhere.

Ongoing national rivalries, exacerbated by the economic turmoil of the Great Depression, helped precipitate World War II. The militaristic dictatorships of Europe and Japan pursued an ultimately doomed course of imperialist expansionism. Their defeat opened the way for the advance of Socialism into Central Europe, Yugoslavia, Bulgaria, Romania, Albania, China, North Vietnam and North Korea.