You'll need to do your own thinking about this or the exercise will be valueless to you. Consider researching a variety of the world's nations with a view to the wealth of the nation, the number of people living below the poverty line, the GDP, and so on. Especially, compare those places where the poor live on the streets (consider Brazil's effort to sweep them under the carpet during the Olympics) with those nations who provide for their unfortunates.
It might also be worth looking at the distribution of wealth in Catholic countries and the Islamic theocracies with vast oil wealth which doesn't find its way down the food chain.
I'm not sure if this link will help in your particular case, but the CIA's World Fact Book provides much statistical data on all the world's nations.