The rise in material standards of living brings sharp increases in the of population growth: the population explosion. But as material standards of living rises for above subsistence, countries begin to undergo the demographic transition.
Birth control means that those who don't wish to have more children can exercise their choice.Parents begin to find more satisfaction in having a few children and paying a great deal of attention to each.
In the world not all countiries have gone through their demographic transitions. Many countries are not rich enough to have begun the population growth declines seen in developped/industrialized countries.
Up until year 1800 human populations grew very slowly, and human living standards low. After 1800, there is a increase in living standards. And after 1800 population grew as the population explosion took hold. At first the rise in material standard of living brought sharp increases in rate of population growth: population explosion. But as material standard of living rose, countries began to undergo the demographic transition; population growth rates peaked and began to decline.
Contries with high population growth rate: above 2%
Contries with low, below 0.5% or negative population growth rate.
with negative growth rate: