Look at the European Union, where internal borders are almost nonexistent, it has created issues like the refugee crisis in 2015, where countries were unable to effectively control the influx of people. This has led to social and political tensions.
@VulcanMan6 8mos8MO
Those "social and political tensions" wouldn't exist in the first place if it wasn't for this nationalist concept of independent nation-states literally dividing humanity and it's resources.
