Visuals: World population increase

The world population has increased for most years over the past 120 centuries. Some notable exceptions were the Mongolian invasions, which reduced the world population by as much as 11 percent in the 13th century, and the Great Plague in the following century, which reduced it from 475 million to about 350 million.

During the early 18th century, advances in science and the beginning of the Industrial Revolution allowed the world population to skyrocket, as child mortality rates plummeted and life expectancy at birth increased gradually.

Have a look at the chart below and discuss what you see with your teacher.