>My hypothesis is that as societies industrialize, they afford their population more and more activities that are simply more fun and rewarding than having children.

But this is by and large not true. I've traveled, eaten at expensive restaurants, enjoyed a child free existence into my mid thirties and having kids is a blast[*]

My wife was adamantly against having kids when we got together in our twenties, and she changed her mind in her late thirties; she now says that was the best thing that has happened to her.

Finally, there are many studies showing that people lead happier lives when they focus on someone else, have a higher purpose beyond just hedonism or living selfishly.

[*] - I have a supportive partner who collaborates with me so we both get time away and time off from the occasional drudgery or exhaustion of parenting. I still get time to work out, see friends, have time with my wife, all of that. If I couldn't afford the occasional babysitter and had a partner who was absent most of the time, it would be a lot harder!

having kids is a blast

true, but you didn't know until you had them, and society keeps telling us otherwise. we need to change the message and educate youth about becoming parents. but also create a culture where having children is welcome.

in the west we complain about kids running around, making noise, being not under control. and most importantly we blame the parents. in china every child is treated like a treasure. sometimes even to a fault. but at least parents are not being blamed for having children, or for bringing them along when they have noone else to care for them. for example children hanging out at their parents workplace after school is normal. in the west that's ground for getting fired.