In the beginning of the 21st century, world population was recorded to be more than 600 crore. It took centuries to reach upto this massive size of population. In the initial periods of human civilization, population increased at a slow rate, but during the last 100 years, population of the world has recorded an unexpected increase.
Around 8000 to 12000 years before, after the evolution and beginning of agriculture, the size of population was very small. At that time, the world population was around 80 lakh. In the first Christian century the world population was less than 30 crore.
But the increase in trade at global level during 16th and 17th century provided a basis for rapid growth in population. Around 1750, when industrial revolution took place in Holland, at that time, world population was around 55 crore. In 18th century after the industrial revolution, world population increased at a very high rate, it is also called as population explosion. The current technical development has provided assistance in reducing the death rate and has provided a basis for rapid population growth.
