I disagree. You are arguing with a people’s basic right to band together as they see fit in order to create a better society. Some groups will have better ideas than others, and they will enjoy better lives. The others have the opportunity to change what does not work and adopt some of the ideas they see have worked well elsewhere. Today these groups are called nations, and the rule sets agreed upon are in effect within an area defined by a country’s border. Nothing is stopping a group from outside a successful nation from adopting the ideas that have worked better. They can even ask the more successful nation for help in duplicating that success.
The successful nations create their own destiny, and in order to do so, have controls in place. They may choose to invite or accept like-minded individuals as they see fit. They shouldn’t, for instance, encourage or allow immigration of individuals that would have a negative aspect on their society. As far as those who they believe would benefit their society, they should be able to set the rate of immigration to a point where their society can absorb the new individuals without shocking or upsetting the system. These are necessary components of self-determination, a group’s (nation’s) ability to create its own future.
Is it fair that Individual X is born into a successful society and Individual Y is born into a failed one? No. Just as it is unfair that people born into the successful society will be born into different economic strata, be born to parents of varying parenting ability, or be born with different physical and mental capacities.
All these unfair occurrences have been part of the human experience from time immemorial. The good news is that people can band together and change their destinies. Moviing into a successful group is one way. Adopting their practices, even improving upon, them is another. While immigration may have great benefits to the two groups involved, it is not a viable world solution. There is a limit—some limit—on the number of people a particular society can absorb without risking losing some of the attributes responsible for its success. Thus, it is incumbent upon people not fortunate enough to be born into a successful society to recreate that success where they were born. This can be a very, very difficult thing to do, but it can be done. It has been done. It is the history of humans on earth.
I also think it incumbent upon the successful group to take actions to prolong and/or increase its success, creatiing an even more prosperous, healthier, safer, society for its members. To do this, they need an appropriate set of laws and boundaries within which those laws can be enacted and enforced.
I should add that the more successful a society is, the more compassionate it can be to both those within and those without. The U.S., a successful society, gives billions of dollars in aid to the poorer parts of the world. While the amount given by the U.S. isn’t the largest percent, we do give more actual dollars than anyone else. Should we give more? I don’t know what the correct number is. The point, though, is that we have a primary responsibility to ourselves to create the best society we can. That is of value to us and the world’s poor, who have a vested interest in us being able to continue to send billions to them every year.