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Graph of world population over the past 12,000 years . As a general rule, the confidence of estimates on historical world population decreases for the more distant past. Robust population data exist only for the last two or three centuries. Until the late 18th century, few governments had ever performed an accurate census.
The 1920s (pronounced "nineteen-twenties" often shortened to the "' 20s" or the "Twenties") was a decade that began on January 1, 1920, and ended on December 31, 1929. . Primarily known for the economic boom that occurred in the Western World following the end of World War I (1914–1918), the decade is frequently referred to as the "Roaring Twenties" or the "Jazz Age" in America and Western ...
Estimates of world population by their nature are an aspect of modernity, possible only since the Age of Discovery.Early estimates for the population of the world [10] date to the 17th century: William Petty, in 1682, estimated the world population at 320 million (current estimates ranging close to twice this number); by the late 18th century, estimates ranged close to one billion (consistent ...
European economies, by contrast, had a more difficult post-war readjustment and did not begin to flourish until about 1924. [19] At first, the end of wartime production caused a brief but deep recession, the post–World War I recession of 1919–1920 and a sharp deflationary recession or depression in 1920–1921. Quickly, however, the ...
Growth in some communities was often driven by exploitation of limited oil resources, so once wells ran dry or demand slowed, their populations rapidly declined. When Wortham's boom ended, the population crashed from its 1927 peak of 30,000 to 2,000 people in 1929. [70] The population of Breckenridge dropped from a similar high to 7,569 in 1930 ...
This is a list of sovereign states in the 1920s, giving an overview of states around the world during the period between 1 January 1920 and 31 December 1929. It contains entries, arranged alphabetically, with information on the status and recognition of their sovereignty .
By 1913, the British Empire held sway over 412 million people, 23 percent of the world population at the time, [3] and by 1920, it covered 35.5 million km 2 (13.7 million sq mi), [4] 24 per cent of the Earth's total land area.
The ROC claimed 11.4 million km 2 (4.4 million sq mi) of territory, [2] and its population of 541 million in 1949 made it the most populous country in the world. The Republic of China was officially proclaimed on 1 January 1912 by revolutionaries under Sun Yat-sen , the ROC's founder and provisional president of the new republic, following the ...