The 20th (twentieth) century began on January 1, 1901, and ended on December 31, 2000. The term is often used erroneously to refer to "the 1900s", the century between January 1, 1900 and December 31, 1999. It was

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The number of people killed during the century by government actions was in the hundreds of millions. This includes deaths caused by wars, genocide, politicide and mass murders. The deaths from acts of war during the two world wars alone have been estimated at

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• As the century began, Paris was the artistic capital of the world, where both French and foreign writers, composers and visual artists gathered. By

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One of the prominent traits of the 20th century was the dramatic growth of technology. Organized research and practice of science led to advancement in the fields of communication, electronics, engineering, travel, medicine, and war.
• Basic

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• The Vatican II council was held from 1962 to 1965, and resulted in significant changes in the Catholic Church.
• The Wahhabi sect of Sunni Islamgained in influence with the growth

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• The Great Depression was a worldwide economic slowdown that lasted throughout the early 1930s.
• The Soviet Union implemented a series of five-year plansfor

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Mathematics
Multiple new fields of mathematics were developed in the 20th century. In the first part of the 20th century, measure theory, functional analysis, and topologywere established, and significant developments were made in fields such a

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