Fwiw my parents grew up poorer than me and had a lot of siblings. Listening to one of them, they had to refrain from flushing the toilet to save on water, shared beds, dropped out of high school to get a job etc. It was a totally different world but rightly or wrongly lots of child bearing. Among the older gen siblings (6) about half had kids.. no more than two each. In the subsequent generation again some had kids but only one or two. I have kids, wanted more but wife didn't. In this pace of things the birthrate clearly is going down. If two people have at most two kids then population is going to decline.
