[BearsAreCool]

Not OP, also not advocating for totally open borders and am specifically focusing on the claim related to borders and their effect on peace.

From my own experience it is far easier to dehumanize and even demonize someone or some group of people that you don't personally know. I was lucky enough to have the experience of living in another country outside of the US for a large period of childhood and personally knowing and loving people in that country has shaped how I view every "dispute" between the US them. It reminded me that these countries are not faceless titans battling each other like some kind of Olympic competition, but rather are made up of individuals whom I care deeply about and any blow to the country is a blow to them. They are not just a soulless "them" but are instead individual people and it hurts me when they are hurt. I can talk all day about utilitarian ethics and maximizing happiness on all the globe but at the end of the day I care so very much more about those who I know. While war is not even really close to being on the table for this country, I know that I would vehemently oppose it. If borders were more closed it is very likely I never would have gone to that country, in fact restrictions in place already made it difficult though achievable. Even if someone has not traveled to a foreign country, every immigrant that he or she will meet is an ambassador for their home country.

Of course, many of the more despicable acts in history come not from physical borders between countries but borders put in place by more invisible factors like societal norms. Barriers between men and women, the old and young, and naturally between those of different caste and ethnicity. To continue the parallels in the article, with privacy we have seen the borders shift from some vaguely defined border on individual social media platforms to closer and closer to each individuals mouth, where we increasingly act with restraint on what we say for fear of retribution from friends, family, or even the government. As you touch on with things like immigrants being fodder for exploitation, when the borders of a country open we often simply move the true borders between humans from those of a country to those of society.