I think community support is more important than all those factors.
Having children is much easier when you are close to parents, friends, and family that share the load. If your family willing to babysit, that saves like 20K a year in a metro area. If your friends have kids, you don't have to choose between personal social time and child rearing.
The realities of the world are set up such that you have positive feedback making it easier if your peers are having lots of kids, and negative feedback making it harder if your community is having fewer kids.
I have friend groups that have lots of kids and it works out great for them. They socialize multiple times a week for dinners during the week or barbecues on the weekend. One parent will passively watch the kids while the other six or seven parents hang out and enjoy themselves. This lightens the load on everyone.
Having children is much easier when you are close to parents, friends, and family that share the load. If your family willing to babysit, that saves like 20K a year in a metro area. If your friends have kids, you don't have to choose between personal social time and child rearing.
The realities of the world are set up such that you have positive feedback making it easier if your peers are having lots of kids, and negative feedback making it harder if your community is having fewer kids.
I have friend groups that have lots of kids and it works out great for them. They socialize multiple times a week for dinners during the week or barbecues on the weekend. One parent will passively watch the kids while the other six or seven parents hang out and enjoy themselves. This lightens the load on everyone.