Arts and Global Issues

Today I was thinking that what if instead of writing just your own feelings and love or even worse about parties and expensive 'lifestyle', artists actually started writing something that would touch global issues like hunger, AIDS, conflicts, family abuse. What do you think? Can you list songs that have made you think and try to be more caring towards each other and become a better citizen?

one of my favourites, for example, is Michael Jackson's song "Earth" :)