I don't think that's true. There's a lot of crisis and uncertainty today, but fertility is still going down. Many people are investing their resources in zero offspring.
Before chlorination of water, everyone, everywhere was at risk of getting sick at any time. Same with infections and death at childbirth. The amount of uncertainty compared to that is far lower, not saying it's great, but on average far better.
Also, note that humans had an absolute population explosion. I'm not saying we are or are not overpopulated, but if we are the following would be a good explanation of what is happening.
I think people underestimate the depth of crisis and uncertainty that exists outside the modern developed world.
And do people "outside the modern developed world" perceive that as "crisis and uncertainty" or "just another Tuesday"?
> I think people underestimate the depth of crisis and uncertainty that exists outside the modern developed world.
Crisis isn't defined by parachuting in a person from a Western developed country, and seeing how they feel about living in those conditions. It's a subjective feeling based on what you're used to.
I think the GGP is wrong, and the "people always have more babies in crisis and uncertainty" is not a reaction to "crisis and uncertainty," it's a side effect of move primitive technological conditions, not some kind of reproductive strategy.
First, I'll note that I meant "modern, developed world" in a temporal as well as geographic way. Second, I'd note that "a subjective feeling based on what you're used to" applies just as much to the modern, developed world, so I don't really understand the contrast. Finally, I'd argue that high levels of child mortality are still traumatizing, even if you're "used" to it.
One thing people never get about fertility crisis: people always have more babies in crisis and uncertainty. Simply matter of reproductive strategy: when you're not sure about the future, push for quantity, as fast as possible. When you have stability, you can accumulate resources, and not be afraid to invest them into fewer offspring. I don't think that people realize that they're doing this choice, but there must have been enormous evolutionary pressure for this to evolve, and a lot of data shows exactly that.