We didn't get into WW2 because of the holocaust, we got into because Hitler was about to take over all of Europe. Perhaps if you read up on some of your history you'd realize that.
I'll say it once again, we have no duty to the planet. It's none of our business what some war lord in some african nation does.
Switzerland seems to be doing much better because of their isolationist attitude.
These countries have to help themselves, it's their job to get rid of their poverty.
Did you see Canada give aide to America during the Depression?