20th century

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Centuries: Year in Review (19th century - 20th century - 21st century)

Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s

Formally the twentieth century comprises the years 1901-2000. In common usage the 20th century comprises the years 1900-1999.

The twentieth century was remarkable due to the technological, medical, social, ideological, and international innovations, and due to the rise of war, genocide, and democide on an unprecedented scale. Virtually every aspect of human life had changed in some fundamental way by the end of the twentieth century.

Important developments, events and achievements

Significant persons