I like your comment, and thank you for citing specific authorities. However, I don't see how open borders are compatible with the prosperity enjoyed by America

I like your comment, and thank you for citing specific authorities. However, I don't see how open borders are compatible with the prosperity enjoyed by America and much of Europe. As an ethical matter I'm inclined to agree; but as a practical matter, it would appear to me that there are only two ways to create wealth: inequality within one nation, wherein a comparative few enjoy significant advantages over many, or inequality within nations, wherein a comparative few nations enjoy significant advantages over others ("wealth" is defined here as quality of life, like highly available healthcare and other resources, not just significant capital). I don't feel educated enough on this matter to have a qualified opinion, so this is just me responding for the sake of discussion and in the interest of learning more. I'd like to hear counterpoints to what I just said. Intuitively I feel that any discussion of the ethics of open borders must (as a practical matter) include the socioeconomic ramifications (more generally, I think any discussion of ethics should include practical implications). To put it succinctly, it is not obvious to me that the quality of life enjoyed by e.g. Americans or Western Europeans can be evenly distributed.