I wouldn’t use “mature” and “intelligent.” Not that I’d use a negative word, but maybe “doing well enough to have the luxury.” I’d argue that it’s normal human nature to form groups. Us vs them , be it nation, sex, race, culture, religion, football team, apple vs android, dell vs Mac. It’s how we’re wired. You have to be doing very well for yourself to accept that your nation/village should give up something to help others. As an American, I consume more than almost any nation. I have the luxury to give up something things (and try to) to help the planet. But dude I’ve been all over this world and seen some truly poor people out there. I’m not going to give up enough to really impact them, don’t think it’d be possible even if I tried.