[mothballed]

Most people worry more about what they'll do if they survive than what they'll do if they die to the point I don't think "what if we all die" even barely registers in the calculation of whether to have kids. IF you all starve it's all a moot point. In even an African village everyone who wanted a house could just build it on the copious land available with whatever materials you could find-- I would assert having a home is more precarious now than even medieval or even pre-historic times as the regulations and law will banish you to the street today if you just build whatever you can afford to build as was done in practically all times before.

I don't spend much time worrying about what I'll do for my kids if the nuclear apocalypse happens. I would still have kids if it was 90% chance of the apocolypse, whereas I'd probably not have kids if there were a 30% chance I make just enough to survive but not so much I can pay child support and I sit in a jail cell while everyone around me does nothing but rags on me for being a deadbeat and failure of a father.

Note: Also, except for the first few years, having kids made your situation less rather than more precarious in the agrarian age