>Only a few will make personal sacrifice for the common good.

Are you vegetarian? I chose to, only because I want mankind to live on this planet for a long time. That's not a sacrifice, that's a basic choice. I'm not sacrificing stuff when I chose to behave responsibly (e.g driving safely, not stealing my neighbors, paying taxes, etc). Do you think people only pay taxes because they fear the police? Or they don't kill each others only to avoid going to jail? Of course they are abuses on our systems (like any social situation), but if you think most people behave responsibly only to avoid a kind of punishment, then you have a very dark idea of society or you hang out with bad people (that can change).