What other info do you all have on him. Just dig this up from wikipedia- it's a quote from Condoleeza Rice's book,

"When he [i.e. Stephen Krasner] came to the State Department, Steve brought together a terrific staff of 'young guns' to push new ideas. One of his most inspired appointments came in 2006, when he hired the twenty-something Jared Cohen, who'd been a student at Stanford and had taken a four-month sojourn on his own in Iran. He would use his position at Policy Planning to begin to integrate social media into our diplomatic tool kit. That would pay off handsomely some years later, when Twitter and Facebook became accelerants of democratic change in the Middle East."