Edit: My bad. It's not Snowden's fault that no one cared :( I deserve the downvotes. Coincidentally, following the comments and other posts I've realized that he is, in fact, quite the definition of a tragic hero.
I don't know... did he achieve anything lasting? Are we better off? Is he? He tried something, it didn't work. I'm not convinced he did it out of the goodness of his heart amd I'm fairly certain he did not envision a life sucking off the Kremlin just to remain safe. Don't get me wrong, this could and should have crippled our trust in all governments... but it didn't.