That's far from the only reason. Lives were very different 100 years ago, women stayed at home, kids were raised without any high expectation, just running arou

That's far from the only reason. Lives were very different 100 years ago, women stayed at home, kids were raised without any high expectation, just running around, doing errands and luckier going to school. How would modern urban family manage to raise 10 kids? Young people usually jump quickly into parenthood, then are overwhelmed by the continuous drain that you can't escape from. Women are exhausted long after giving birth. How do you want to drive around with >3 kids? Organize their activities? And actually have a full-time job that pays it all? Even if property/rental prices would be good for many-bedroom places (they usually aren't), the rest is quite an effective blocker for most.