Closed-borders libertarianism refers to a perspective within libertarianism that supports immigration restrictions, arguing that property rights and individual freedoms can justify limiting who can enter a country. Proponents believe that unrestricted immigration can infringe on the rights of property owners and may lead to negative economic consequences for citizens.
https://www.splicetoday.com/politics-and-media/closed-borders-libertarianism
https://mises.org/library/book/open-borders-are-assault-private-property
https://activeobjectivism.com/2019/02/17/closed-borders-a-rights-based-defense/
https://brucemajors.substack.com/p/closed-borders-libertarianism-c91