Per contra, Population Implosion

 After watching the insane mob visit Venice now, it is topical to reflect on the "other side"—too few people. Ill.: Abandoned village in Spain.

: “At their current fertility rate, for every 100 [South] Koreans, there’s only going to be 6 great-grandchildren.” (To which he added, “And that is insanely optimistic.”) Could that be true? Not really. The true way of describing the effects of a 0.8 total fertility rate would be this: At their current fertility rate, for every 100 Koreans born today, there would be 6 great-grandchildren born in about 90 years.” That is, the 100 babies (50 of them female) would have 40 children (20 of them female), who would have 16 children (8 of them female), who would have 6 children. He says it like the population will fall 94% in that time, but it’s probably closer to 60% because we’re not starting with 100 babies alone; there are a lot of people already alive — but still! A total fertility rate of 0.8 (and maybe still falling, if you don’t want to be “insanely optimistic”) is enough to drive a serious population decline, much of which is already baked in to Korea’s future. This is the most extreme case in the world by a fair bit — which makes it a dumb place to start a conversation about global population — but it’s real.