You aren’t going to be able to make everyone go off of birth control, but, if you want more people and more family stability then we have to go back to multigenerational families. The nuclear family might be convenient for industrialization but it is inherently unstable. Many hands make light work, and more time for baby making. It’s also more economical to share resources between the generations and makes it easier for young couples to get ahead.
A culture change...a religious awakening....something is required. But I firmly believe in multigenerational families.