I didn't know whether to post this in Philosophy forum or here. Either way, it's rather interesting topic. I found this essay by Richard Chappell, a lecturer in philosophy at the University of York. https://aeon.co/essays/do-people-have-a-moral-duty-to-have-children-if-they-can He directs moral questions. At people who want to have children: Is it ethical to bring a children into this broken world, where they might suffer – and partake in – various harms and injustices? At people who prefer not to have children: Is it "selfish" to refrain from procreating and failing to contribute to the future of humanity – to the building of the next generation?