Verified answer

In some ways it's more a matter of living than growing. Used to people would have a lot of kids sometimes up to 22, but only a few of them actually survived to adulthood. However as medicines and knowledge and technology got better more kids were able to survive to adulthood; and people went from generally living up to about 40 to somewhere about 80. (life expectancy).

Many Reason.

1. Medical evolution (75%).

a. Which reduces new born children death rate. 50%

b. & reduces diseases death rate 25%

2. Civilization (15%)

3. Science Evolution especially in farming (10%)

All of the Industrial changes! And the changes in food and technology have made it better and easier to bring children into the world.

FOSSIL FUEL, It has only grown during the last 100, about the time of the industrial revolution

Science.

Extremely interesting question, hopefully we'll get some good answers

This topic is worth people's attention

Higher birth rates and lower mortality