There are about 8.2 billion humans on this planet, which is probably about 8.2 billion too many, but let’s set that aside. It takes a fertility rate of 2.1 to flatline that level, and we are moving from an era of grotesquely large numbers of new humans to a dying, shrinking world (particularly in the well-educated, prosperous places; impoverished shitholes are cranking out LOADS of babies still).
