If you're newly graduated from college, you may be wondering right about now just how you're going to save the world.

Your commencement speech, after all, was probably delivered by a well-to-do older person who exhorted you to go out and make a difference somehow. Lots of other people will offer advice on what to with yourself as well -- rent "The Graduate" sometime and listen for that line about "plastics." Joseph Campbell, as silly as he was sage-like, might have suggested you "follow your bliss."...