When Global Overpopulation became Underpopulation

Perhaps you have suspected that the specter of world overpopulation has been exaggerated, but still accept the inevitability that the human population will exhaust the Earth's resources. You will be pleased to learn that, as societies become more advanced, their birth rates decline. In the most advanced countries, like the US and China, populations have declined to a point where it has become difficult to sustain themselves. 2020 Feb 10 - Source: Truthstream Media - https://youtu.be/ro7SZ1uEBTs/