How scared should we be of Cyberia? For Princeton’s Anne-Marie Slaughter, our hyper-networked world is, on balance, a benign place and the “United States . . . will gradually find the golden mean of network power.” At the other extreme is Joshua Cooper Ramo, whose book “The Seventh Sense” argues for the erection of real and virtual “gates” to shut out the Russians and other malefactors. But Ramo himself quotes the three rules of computer security devised by the NSA cryptographer Robert Morris Sr.: “RULE ONE: Do not own a computer. RULE TWO: Do not power it on. RULE THREE: Do not use it.” If we all ignore those rules, how will any gates keep out the likes of Assange?