"You can't have a country where everybody lives in a nursing home." But that's the way Europe's going: the birthrate in southern and eastern Europe is now 1.3, and in northern Europe 1.8, both below the replacement rate. Britain needs over 60M new immigrants by 2050 to hold its workers-to-pensioners ratio. It's even worse in Thailand (birthrate 1.5) and in S Korea and Japan (birthrate 1.1). In contrast, the U.S. birthrate is 2.1.