when my mother was born the population was here
three of the countries with extremely high birth rates--Brazil, China, and India--have all found novel ways to reduce their own meteoric growth; China has the One Baby law, India is being reshaped by women who have been taught that sex is necessary but not 'nice' and are passing that along to their daughters; and in Brazil voluntary sterilization is becoming the norm, almost simultaneously across the country. A woman has one child and requests a tubal ligation at the same time. As they put it, " the factory is closed".
We won't live to see the impact, but in 20 or 30 years, if things continue this way, the population growth could very well level out as older, more populous generations die off.
There are all kinds of revolutions, and they often start at the bottom because people want a better life for themselves and their children.