No, I don't do the shop prep stuff.
There isn't a subcontinent or a cultural region on earth where the wealthiest state or nation doesn't already have negative population growth. Once barriers to birth control are removed, fertility rates fall almost overnight! The problem of overpopulation is already solved, we knew it for some time now. The problem of UNDERpopulation would be a lot more difficult to tackle.
Negative population growth is bad news for everything: population becomes older (and thus sicker, less productive, less open to new ideas, etc), with no family people become more dependent on government, the supply of labor declines, prices skyrocket, IQ declines for dysgenic reasons (because the most backward religious zealots do the lion's share of the breeding), wars break out as old shrinking superpowers like Russia can no longer defend their natural resources from younger countries like Pakistan, etc, etc, etc. Instead of building vast greenhouse or factory space-stations and spreading to others stars, humanity could be headed for a new dark age!