demographics - not fully digested yet

I haven't figured out what makes people want to have kids/not have kids. Might not make sense. Likely oversimplified. Probably not politically acceptable. Certainly not complete.

I think it has something to do with a combination oflifestyle:
--For you "haves" who have none or few kids: is it because it is inconvenient when both work and you want to give each other (and your one/few kid(s) if you have any) the best because that's what you've had/known and you want them to be able to experience it too one day?
--For you "have nots" (who seem to have more kids than the "haves" think they can afford to care for but you seem to manage anyway): Is it because hardship is all you've ever known and you see nothing wrong with raising your kids that way too?

and Social pressure and optimism/faith:
--I suspect majority of peoplesocial groups with no or few kids are ok with that because it makes it easier to control the variables in their favor of their legacy/lineage; they have bought into the "establishment"; they are (over)confident everything is fine and don't see any cause for it to change now (or ever);
--I suspect majority of peoplesocial groups with many kids are doing so partly in the hope of future generations outnumbering and taking down the dwindling but ever-ascending "elites".

Either way, I suspect our "western" ways are leading us to reproductive insufficiency. Comment/email me if you have any thoughts to share.