[DontTellAnyone]

By making babies? It's not that hard.

Hungary has successfully created incentives to raise their birth rates for example. The Hungarian government doesn't want to rely on mass immigration to sustain the country's population it seems. You don't need imported diversity for more jobs - you can just create very "un-diverse" people yourselves, which will work those jobs once they've grown up.

If other Western nations like the US would seriously get behind an idea like this, with all the power of the media and various propaganda outlets, they, too, would quickly see a cultural shift towards rising birth rates. Unfortunately the people in control don't want this to happen.

Whether ever-continuing growth to chase the 0.3% higher GDP each year is desirable, is another topic though.