Thanks for reading Julian. The problem with your theoretical framework is that if this were the case, we wouldn’t have an interlocking web of restrictive immigration policies that keep people of color out of America. If we want more citizens and more soldiers, we could raise our immigration quotas. Germany has reversed their population decline through opening their doors to immigrants. Japan continues to be a declining population because they won’t.
If conservatives were concerned with population growth, they would be interested in loosening immigration restrictions, not building walls. Thanks again for reading.