Surely population control is inevitable if our systems fail anyway. These people were just able to think ahead, see it coming. Don't agree with all the quotes especially the one about being merciful to your child by killing it but we do act like a virus, invading, detroying and reproducing. Unfortunately we can't go into a state of stasis when conditions aren't right for us to invade, destroy and reproduce like some viruses can.
Population control being implemented through planning and policy is probably never going to happen. The PTB have tried through war and famine and more
recently disease and they'ved had a negligible effect when looking at the Big Picture. They'd effectively have to round us up and kill en masse, or
cut the food/water supply to entire population until all (pretty much) had died.
Maybe they will. Look at all the underground facilities that have been built that can house thousands and in some cases tens of thousands of people
for substantial amounts of time. Look at all the concentration style 'holding facilities' govts like the US and UK have built recently.......