Your comment isn't entirely relevant to the subject of the article. The article is about how the US fertility rate is at about 1.6 now. That's not enough to k

Your comment isn't entirely relevant to the subject of the article. The article is about how the US fertility rate is at about 1.6 now. That's not enough to keep the population from shrinking. That's the author's point about why the U.S. will need immigration in some form or another going forward, because the only alternative will be a shrinking population and an increasingly older demographic.