Every state is selfish, it's one of the fundamental principles of foreign relations. Even when states are altruistic (e.g. the US Centers for Disease Control do

Every state is selfish, it's one of the fundamental principles of foreign relations. Even when states are altruistic (e.g. the US Centers for Disease Control doing epidemic surveillance and distributing Ebola vaccines in Africa, or sending foreign aid to poverty-stricken countries) ultimately it's for self-serving reasons. The global system is essentially anarchism.