By 2000, there were approximately ten times as many people on Earth as there had been in 1700. Drake alabama shirt. During the 20th century, the global population saw its greatest increase in known history, rising from about 1.6 billion in 1900 to over 6 billion in 2000. Nonetheless, population growth is the long-standing trend on all inhabited continents, as well as in most individual states.
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The Black Death pandemic of the 14th century may have reduced the world’s population from an estimated 450 million in 1340 to between 350 and 375 million in 1400; 23 it took 200 years for population figures to recover. 18 19 Even earlier, genetic evidence suggests humans may have gone through a population bottleneck of between 1,000 and 10,000 people about 70,000 BC, according to the Toba catastrophe theory By contrast, it is estimated that around 50-60 million people lived in the combined eastern and western Roman Empire in the 4th century AD. 20.