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Modern humans evolved in Africa about 200,000 years ago and began
You are studying about the world population. You are going to read the
Then just 12,000 years ago, several cultures shifted from hunting and
migrating to other parts of the globe about 100,000 years ago. Our earliest
ancestors relied on hunting and gathering their food to survive. Only a
finite number of people could be supported on the wildlife in an area for a
to control its own food supply. Civilizations grew and so did the human
30
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following article to understand how the world population has grou
limited amount of time.
gathering to farming. Humans became the first and only species a
population. About 2,000 years ago, the estimated world population wo.
170 million people. The largest civilizations at this point in history wew.
the Roman Empire and the Han Dynasty in China. The next 1,700 years
were marked by the growth and conquest of empires, global navigation
and exploration. People had yet to understand the science behind life
and death, or how to prevent and treat most diseases. As a result, many
children died young. Our global population grew, but slowly, reaching
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about 500 million around 1500 and 1 billion by 1804.
By the late 1700s, the world was embarking on the Industrial
Revolution, a period of history in Europe and North America, where there
were significant advances in science and technology. The Industrial
Ainge and Chia
Revolution brought the invention of the steam engine and the use of
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humans start
electricity. During this period, there were also many inventions that
promoted longer life. These included improvements in farming, nutrition,
medicine and sanitation. Now, people were able to fight once-deadly
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germs, produce more and different kinds of food, and cure more illnesses.
Before long, these new discoveries and inventions spread throughout the
world, lowering death rates, especially among children, and improving
people's quality of life.
Now you might be wondering what happened to the birth rates
while the death rates were coming down. In Europe and North America,
on re
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