The problem with that is EVERY nation feels that way!! Iran feels like when they do what is best for Iran, they do what is best for the world, China feels like when they do what is best for China, that's what is best for the world and so on....sure, the individual people probably don't all feel that way-but nation-state conciousness is very ego-centric.
There are times when we do all have to play nice and get along and sometimes that means that we can't do exactly what we want. Wise leaders of nation-states will know how to "pick their battles".
We had a TON of international support for the USA when we were focusing our attention on going after terrorists, because other nations could see that as a benefit to all. It was only when we started going after something that wasn't in everyone's interest, only our own, that we lost support.