I was indeed considering this shortly before submitting the comment. Then I remembered we have weapons nowadays not available back then. It is a very bad way to “solve” this issue.
But again that’s the cynical view. The better and more optimistic view is that… it’s all a freaking hype, and we just need to figure out what to do next.
The number of offspring is a function of the average education and security of the population (especially the female). More education and security (i.e., more middle class), fewer children.
At least that's how I got the popular statistics from Hans Rosling.