There are 6.5 billion people on Earth, not 1 billion.
The Earth's population reached 1 billion way back in the 1850s.
There were just 50 million people in the world in 1000 BC, around the time the Iron Age ended, the Phoenician alphabet was developed, the Iranians entered Persia (modern day Iran) and
Zhou zhao wang, King of the
Zhou Dynasty of
China, died.
In 500 BC, the world's population was 100 million, approximately the time that
temple of
Jupiter on
Rome's
Capitoline Hill is dedicated on the
ides of
September, a solar eclipse occurs in Egypt, Rome becomes a Republic, Bantu-speaking Africans migrate into Uganda and Cadiz in Spain is captured by Carthage.
When Jesus was born, the world's population was 200 million.
From 1000 to 1100, around the time of the Norman Conquest of England, Stephen I becoming King of Hungary, Denmark's annexation of Norway and the invention of gunpowder in China, the world's population was 310 million, around the same size as just the population of the United States. Even then, China had the world's biggest population - it was 60 million, like Britain's is today.
In 1750, the world's population was 791 millon.
It finally reached the 1 billion mark around 1820-1830.
After that, it grew much more rapidly. It reached 2.5 billion in 1950, 4.5 billion in 1980 and today it is 6.5 billion.
In 2050, it'll be around 10 billion.
BUT, the world is NOT overcrowded. The United States (despite its large population) is mostly empty, so too is Canada and Australia. You can travel for hundreds of miles in canada, the US and Australia without even seeing a single person.
The same is true for vast swathes of Russia, Mongolia and other parts of Asia.
And then there's Antarctica - it's twice the size of Canada and has a population of just 1000.
