Why has the human population increased so much in the last few centuries, although we actually invented effective birth control methods?

Question

Why has the human population increased so much in the last few centuries, although we actually invented effective birth control methods?

In: 211

Answer 1

The life expectancy still grows thanks to the better medicine and healthcare.

Additionally, the birth control is available in the most developed countries where as in third world/developing countries it still either out of reach or outright forbidden.