Activism (or Lack Thereof)

Between Ani DiFranco and one of my current professors, I've been hearing a lot about the terrible things done in the name of America. I've known for a long time that the US isn't the bastion of freedom and generosity that we're all led to believe. So much death and poverty happens so we can live the life we live. We wear clothing made by sweatshop labor; we eat food cultivated on land stolen from South American natives; we wage war to avenge Daddy President and pick up a little oil to boot. Hegemony, warmongering, multinational corporations.. What to do?

I want so badly to just stop it all, but it seems so big.