Over population was a warning back in the 60s and earlier, Its where the nuclear family came from, A husband, wife and keep it to two kids....
Might check India's population problem and Japan is an Island, China held it to one child for a long time.....Goes to resources and the environment. Some countries try to manage their population responsibly and keep overpopulation in check or get it in check.......
One thing is for sure, its none of our business
Send them that in a tweet, Im sure 120 million people can tell you to stuff it pretty quick..