Some EAs are open borders advocates, but open borders is a ridiculously dangerous experiment for the West. They have not satisfactorily accounted for the crime and corruption that immigrants may bring. Additionally, under democracy, immigrants can vote and change the culture. Open border advocates hope that institutions will survive, but they have provided no good arguments that Western institutions will survive rapid demographic change. Institutions might seem fine and then rapidly collapse in a non-linear way. If Western Civilization collapses into ethnic turmoil or Soviet sclerosis, then humans everywhere will suffer.
A good straightforward illustration of how institutions are entangled with culture is the difficulty the West has had exporting democracy to the Middle East.
Syrian openish border events reignited my interest in this so I did a bit more reading:
One the one hand, there is evidence that people who move from a more violence-supportive cultural context to a less violence-supportive one can have their tolerance for violence lessened as a result… On the other hand, violence-supportive attitudes can be imported by immigrant communities from one culture context to another. -Domestic violence attitudes
A good straightforward illustration of how institutions are entangled with culture is the difficulty the West has had exporting democracy to the Middle East.
Syrian openish border events reignited my interest in this so I did a bit more reading: