Earlier quoted context omitted.
The system that we had up until the late 1800s had a natural rate limiter in that the technology of the time made international travel so time consuming and expensive that immigration was simply an impossible pipe dream for the vast majority. It was also limited in impact on the native population because there were no welfare programs of any kind at the time, so an immigrant was never an expense item on the budget. I…
> national suicide Why do you think that? The same thing was said about the Chinese, Italians, Polish, etc... when they all came here. Instead they helped make the country what it is today. I also don't see anyone arguing for open borders, but straight forward paths for people to legally immigrate.
I don't really have a strong opinion either way on it, but I think your question was addressed by the natural rate limiter mentioned in the comment you were replying to.
Just like I was happy to have a free blog without a robots.txt 5 years ago, but now with the AI crawler and other traffic I'm looking at using Cloudflare "are you a human" blocks or whatever.