Actually, there is: economics.  You can&#x27;t have a successful country and exclude everyone who wasn&#x27;t smart enough to be born there.  In a world of N billion people, a lot of talented people are going to be born abroad.   Keep them out, and they&#x27;ll concentrate in other places.<p>Do you realize how much of the tech world was built be people from all over?  HTTP, Linux, Google, Java, C++ and so on.