To me judging whether or not to have a child solely based on the value that it would have for you and your community, without evaluating whether or not your child will have [the possibilities of] a good life, seems cruelly selfish.
If you're not sure that there's a stable future to bring a child into, then it only makes sense to wait.
> The world in general, and especially the United States, has never been more peaceful and prosperous as it is now.
Nevertheless, there's a good case to be made that the next few decades will be "interesting times".
> Human civilization needs more people, now more than ever.
Why? For what? I mean, I like humans but there are billions and billions of us. What purpose do you see for which our teeming numbers would not already suffice?