Matt Bai's New York Times Magazine profile of John Edwards (which I meant to link to a couple of weeks ago, but apparently didn't) ends like this:

It took 40 years after Robert Kennedy's death for another establishment Democract to summon the courage to build a campaign around economic injustice. If Edwards should win the nomination but lose the White House, it might well be another 40 years before anyone tries again.

That's reason enough to vote for him right there.