"it's not my fault that people are starving"

People don't get involved in solving global poverty because they say "I did not cause it."

First, how do we know that? We are voters and money users in the most powerful nations on earth, devoted to our self interest above every other consideration. Our decisions have always had major influence on the shape of the world, yet we insist that we do more good than harm to all other nations. How do we know?

Second, that is irrelevant. We are not evil because we caused poverty, we are evil because we could save individual lives, at no cost to ourselves (e.g. by spending less on getting fat), but we choose not to.