^There is a way to prevent population decline: have more babies! I know, simplistic thing to say, but still very true. The trick is getting a society where it is a good thing for the prospective parents to have kids (and more than one). How? I have no ready solution, but free/cheap daycare for the kids is a must if both parents are to be part of the workforce. Affordable/free healthcare is also a big thing. If having a kid will make you poor, you're less likely to have kids.
Nexus6 - If you haven't already, see the movie Idiocracy. It describes that problem well, and in a really funny way.
Forumers met so far:
Huopa, Nightsky, Jo, wolkenkrabber, ThisSideofSteinway, jacksom, New Jack City, LeCom, Ellatur, Jan, Dennis, Ace, Bardamu, AtlanticaC5, Ringil, Dysfunctional, stacey, karakhal, ch1le, Hviid, staff, kjetilab, Þróndeimr, queetz, FREKI, sander, Blue Viking, nomels, Mantas, ristov, Rafal_T, khaan, Chilenofuturista, Jonte Myra, safta20, AW, Pas, Jarmo K, IceCheese, Sideshow_Bob, sk, Ingenioren, Ayreonaut, Silver Creations, Hasse78, Svartmetall