A year ago, Jason Russell was a nobody. Not a nobody, precisely, but just ordinary. Normal. He was a healthy father of two, living in San Diego, and was happy in his work as a director for Invisible Children, a nonprofit organization he'd helped found.

And then, on March 5, 2012, he released "Kony2012", a 30-minute film that explained why the world needed to catch and bring to justice Joseph Kony, an African warlord, who, over the previous 26 years, had abducted 30,000 children and turned them into soldiers and sex slaves. Russell directed and starred in the film, and within hours it was on its way to becoming what was then the most viral video of all time. It took a day to hit a million views; six days to reach 100 million. Every news outlet on the planet, it seemed, wanted an interview with him. Every news website in the world carried a story on him. Every blogger had an opinion on him. More than a million people left a comments on YouTube. On Facebook, 11 million people clicked on "share."

Ten days later, he ripped his clothes off his back, ran out naked into the street near his San Diego home, slammed his hands repeatedly on to the pavement, battered himself against parked cars, and screamed obscenities until he was eventually led away by police. This, too, became a viral video.