The Law of World Citizenship Shall Be Limited to Conditions of Universal Hospitality"
"Hospitality means the right of a stranger not to be treated as an enemy when he arrives in the land of another. One may refuse to receive him when this can be done without causing his destruction; but, so long as he peacefully occupies his place, one may not treat him with hostility. It is not the right to be a permanent visitor that one may demand. A special beneficent agreement would be needed in order to give an outsider a right to become a fellow inhabitant for a certain length of time. It is only a right of temporary sojourn, a right to associate, which all men have. They have it by virtue of their common possession of the surface of the earth, where, as a globe, they cannot infinitely disperse and hence must finally tolerate the presence of each other. Originally, no one had more right than another to a particular part of the earth. (..)

The inhospitality of the inhabitants of coasts (for instance, of the Barbary Coast) in robbing ships in neighboring seas or enslaving stranded travelers, or the inhospitality of the inhabitants of the deserts (for instance, the Bedouin Arabs) who view contact with nomadic tribes as conferring the right to plunder them, is thus opposed to natural law, even though it extends the right of hospitality, i.e., the privilege of foreign arrivals, no further than to conditions of the possibility of seeking to communicate with the prior inhabitants."

https://www.mtholyoke.edu/acad/intrel/kant/kant1.htm