> I will say I am constantly struck by how some of my relatives from previous generations were able to have 10 kids in a 3 bed house (relatively poor) and survive, let alone be happy. Anyway that one could be relevant overall, but I am curious nonetheless.
I'll offer insight. As someone who attends a very traditional catholic parish, where a ten child family would be considered only slightly above average, the more children you have... the more social you're going to be.
The more kids you have, the larger your network. Your kids become friends with someone else's kid and then you become friends with their parents. If you have two kids with five friends each, then this is 10 parents. If you have ten kids with five friends each, then this is 50, and you now have friends of all different ages, since the kids are not all the same age.
As an example, the lady with one of the most kids at our parish, is also in some ways the center of the social life. She organizes a lot of events, and even if she's not around at a particular event, one of her kids and their family (some of the older ones are married) are there and you can communicate with her through them.
Also, having so many kids, you have to rely on others for help.
When we go to activities where there are smaller families, we notice how little 'help' we get with our children. This makes sense. With only two kids... that's manageable by two people. On the other hand at church, everyone will hold our newborn and toddler, take care of them for a few hours while my wife and I get some nice socializing time. Large families being the norm, everyone wants to help parents with young kids because they want that help reciprocated when they have a newborn or young children again (or in the case of older couples, they feel obligated to pay it forward).
In contrast, with just one or two, it's easy to evolve the 'pull yourself up by the bootstraps' mentality that is becoming so prevalent these days. In some ways, I think the shrinking family size has a lot to do with the loneliness many experience.