What we live in is not the age of the extended mind but the age of the inverted self. The things that have usually lived in the darker recesses or mad corners of our mind—sexual obsessions and conspiracy theories, paranoid fixations and fetishes—are now out there: you click once and you can read about the Kennedy autopsy or the Nazi salute or hog-tied Swedish flight attendants. But things that were once external and subject to the social rules of caution and embarrassment—above all, our interactions with other people—are now easily internalized, made to feel like mere workings of the id left on its own. (I’ve felt this myself, writing anonymously on hockey forums: it is easy to say vile things about Gary Bettman, the commissioner of the N.H.L., with a feeling of glee rather than with a sober sense that what you’re saying should be tempered by a little truth and reflection.) Thus the limitless malice of Internet commenting: it’s not newly unleashed anger but what we all think in the first order, and have always in the past socially restrained if only thanks to the look on the listener’s face—the monstrous music that runs through our minds is now played out loud. A social network is crucially different from a social circle, since the function of a social circle is to curb our appetites and of a network to extend them. Everything once inside is outside, a click away; much that used to be outside is inside, experienced in solitude. And so the peacefulness, the serenity that we feel away from the Internet, and which all the Better-Nevers rightly testify to, has less to do with being no longer harried by others than with being less oppressed by the force of your own inner life. Shut off your computer, and your self stops raging quite as much or quite as loud.