[silverquiet]

Maintaining the global temperature within a certain range also seems important to the survival of human society, but we seem to be deadset on cranking up the thermostat regardless of the consequences. I suppose whatever will be, will be, but almost no aspect of modern life feels particularly rational; having children included. It's post-modernism all the way down, and if you want to have kids for whatever reason, then have them. If not, then don't. But I suspect very few people consider the perpetuation of society as high on the list of reasons to have them; that's too abstract while being woken up at 2AM is anything but abstract.