For me it all depends on who is declining. I want normal, mainstream white Americans to be competitive with the other 4, 6, 8-kid families of the world because we are the people who actually tend to place some form of value on America, its traditions, and its values.
The more everyone EXCEPT us reproduces, the more people we will have within our borders (voting in our elections) who are all for doing away with everything that makes this country great.
Europe is in the same boat.
In London, white Anglos are now a minority to Muslims. How long do you think the West's ideals and principles are going to remain intact with all the West's populations in decline and being replaced by people who have nothing in common with us?
Part of it is inevitable though, we have abortion, birth control, condoms, social programs that make it unnecessary to have kids, etc. They often don't