Exactly. People seem to forget why birthrates were so high in the past. It is not just lack of abortion (which happened), but the fact that more children would provide additional help in the daily farm work. In other words, it was very cheap ho have children and the financial benefit existed. In a post-industrial society, these incentives are reversed. It is very expensive to have children, and there are no financial incentives. That's why we have the declining birth rates everywhere we have an economically developed society.