[connicpu]

Back in the olden days when the majority of human labor was agricultural, having more children meant more hands to work the farm, so having more children actually improved your resource situation. Humans on some level have a biological drive to procreate as well, but if the incentives against having children become strong enough the humans will prioritize short term survival, or maintenance of their standard of living which can feel like survival if slipping for even one month means homelessness.