By it's definition, changing the world is not "sitting down with your arms crossed", bitching about how no one is doing anything about it is though. If you care about millions starving, I would suggest working for a respectable nonprofit and going there and helping them yourself. The things that are most effective at causing change may require you to sit down, shave your 'hawk, and cover up those sick chaos tattoos though. It all depends what's important to you: making a difference or looking good trying. You would change the world a lot faster by suing a starbucks than throwing a brick through one.