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For other uses, see 20th century (disambiguation).
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The Earth seen from Apollo 17. The second half of the 20th century saw an increase of interest in space exploration.
|Millennium: |2nd millennium |
|Centuries: |19th century · 20th century · 21st century |
|Decades: |1900s 1910s 1920s 1930s 1940s |
| |1950s 1960s 1970s 1980s 1990s |
|Categories: |Births – Deaths |
| |Establishments – Disestablishments |
The 20th century of the Anno Domini began on January 1, 1901 and ended on December 31, 2000.
The British, Chinese, Russian, German, Ottoman, and Austro-Hungarian empires dissolved in the first half of the century, with all but the British, French, and Japanese empires collapsing during the course of World War I, and Russia transformed into communist state of Soviet Union. The inter-war years saw a Great Depression cause a massive disruption to the world economy. Shortly afterwards, World War II broke out, pitting the Allied powers (chiefly the United States, the United Kingdom and the Soviet Union) against the Axis powers (Nazi Germany, the Empire of Japan, and Italy) which eventually resulted in a total victory for the Allies, at the cost of over 60 million lives and the complete devastation of many nations. Remaining colonial empires dissolved shortly after the war. As a means of preventing future world wars, the United Nations was formed; however, competition between the two new superpowers, the Soviet