Facebook and twitter came at a pivotal time in history. The chicken or the egg theory can be applied here in asking: Did twitter and facebook help revolutions grow, or did they help track people involved in uprisings? (In both the case of the Arab uprisings and the Occupy movement.) I would say both.
Against all previous form, I took part in a round of the X Factor this week. It was the familiar mix of competing styles and contingent emotion, followed by measures of first kind then merciless appraisal. My group didn't win: our blend of British "existential angst" with bold Brazilian overtones lost out and we were sent home.