Rational group interest IS rational self-interest.
As social animals living in communities and as part of any number of groups, we must, if we’re rational, be mindful of the well-being of groups, because our own well-being depends on it.
‘Rational self interest’ is just being selfish.
No it in fact is not. Selfishness causes any number of negative consequences - suffering, hostility, crime, conflict, rebellion, war, death… So it’s bludgeoningly obviously irrational, and therefore cannot be rational self interest.
Rational group interest IS rational self-interest.
As social animals living in communities and as part of any number of groups, we must, if we’re rational, be mindful of the well-being of groups, because our own well-being depends on it.
No it in fact is not. Selfishness causes any number of negative consequences - suffering, hostility, crime, conflict, rebellion, war, death… So it’s bludgeoningly obviously irrational, and therefore cannot be rational self interest.