Write about the 20th century
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The 20th (twentieth) century was a century that began on January 1, 1901and ended on December 31, 2000.It was the tenth and final century of the 2nd millennium. It is distinct from the century known as the 1900s which began on January 1, 1900 and ended on December 31, 1999.
Millennium:
2nd millennium
Centuries:
19th century 20th century 21st century
Timelines:
19th century 20th century 21st century
State leaders:
19th century 20th century 21st century
Decades:
1900s1910s1920s1930s1940s
1950s1960s1970s1980s1990s
Categories:
Births – Deaths
Establishments – Disestablishments
The Blue Marble, Earth as seen from Apollo 17 in December 1972. The second half of the 20th century saw humanity's first space exploration.
The 20th century was dominated by a chain of events that heralded significant changes in world history as to redefine the era: flu pandemic, World War I and World War II, nuclear power and space exploration, nationalism and decolonization, the Cold War and post-Cold War conflicts; intergovernmental organizations and cultural homogenization through developments in emerging transportation and communications technology; poverty reduction and world population growth, awareness of environmental degradation, ecological extinction; and the birth of the Digital Revolution. It saw great advances in communication and medical technology that by the late 1980s allowed for near-instantaneous worldwide computer communication and genetic modification of life.
Global total fertility rates, sea level rise and ecological collapses increased; the resulting competition for land and dwindling resources accelerated deforestation, water depletion, and the mass extinction of many of the world's species and decline in the population of others; consequences which are now being dealt with. It took over two-hundred thousand years of human history up to 1804 for the world's population to reach 1 billion; world population reached an estimated 2 billion in 1927; by late 1999, the global population reached 6 billion. Global literacy averaged 80%; global lifespan-averages exceeded 40+ years for the first time in history, with over half achieving 70+ years (three decades longer than it was a century ago).