Actually, since control of one's borders is one of the core principles in the definition of sovereignty, it seems that immigration restrictions are quite natura

Actually, since control of one's borders is one of the core principles in the definition of sovereignty, it seems that immigration restrictions are quite natural to how we have organized our societies. Like it or not, we define our societies and nations around very simple us/them constructs and eliminating the desires of the bulk of the population to control what portion of "them" gets to become "us" is not going to change any time soon.