The assumption that a war would trigger another baby boom is incorrect. The conditions are very different than in the 50s and there's no going back. World devas

The assumption that a war would trigger another baby boom is incorrect. The conditions are very different than in the 50s and there's no going back. World devastation, reverting to the stone age or some agriculture society will not result in a population growth for decades, maybe a generation at best, as western society falls into the familiar throes of barbarism and resource starvation. The more likely approach is some sort of mass socialism, for starters. Even if you had technological innovations to breed humans en masse, there would have to be subsidized care. Creating a breeding class, who's job it was to breed and care for children would require a massive upheaval in the social fabric. It's not possible anytime soon. If it was easy, another boom would have already happened.