Cosmopolitanism is the view that gives the interests of people of other nationalities a weight equal to those of one’s compatriots.
Because people in poorer countries are more likely than people in richer countries to face severe problems that could be solved at little cost, it is often a good general heuristic to focus one’s attention on impoverished parts of the world, rather than looking for giving opportunities in one’s local area (assuming one is from a richer country).
Kleingeld, Pauline and Eric Brown (2019) Cosmopolitanism, in Edward N. Zalta (ed.), The Stanford Encyclopedia of Philosophy, October 17.
Section on cosmopolitanism in MacAskill, William & Darius Meissner (2020) Introduction to Utilitarianism: An Online Textbook, Oxford.