>> How would open borders in a country be necessarily beneficial to people in the country? > The benefits of immigration have been addressed many places. It i

>> How would open borders in a country be necessarily beneficial to people in the country? > The benefits of immigration have been addressed many places. It is true that immigration has some positive benefits in many cases, but this does not necessarily (which was in the question) demonstrate that it is net beneficial. > It works fine in Europe. Can you put "fine" in quantitative terms? How did you measure this? How did you measure it against the counterfactual? > The point is not to open only one countries borders though, but all of them, because that's what's really in everyone's interest. It's fine to hold an opinion or belief that "that's what's really in everyone's interest", but there is an important difference between belief and knowledge.