Interesting ping.
Overpopulation is as much a myth as global warming. These are pretty much liberal concepts used to exercise power over people. If you repeat such a mantra over and over again and teach it in schools and practically indoctrinate people, in a few years you get a lot of people convinced, and that's precisely what liberal politicians are looking for. As a consequence, they are able to pass laws, increase your taxes, destroy industries and create new ones, but more importantly, they have more power over the lives of the citizenry.