I apologize to all of my colleagues who've been writing up storms, but as a culture we've essentially put ourselves into a position where Mark Zuckerberg can say, "Privacy as a social norm is no longer relevant," and a lot of people don't blink an eye.

People thought I was very pro-computer. I was on the cover of Wired magazine. [Then things began to change. In the early 80s,] we met this technology and became smitten like young lovers. But today our attachment is unhealthy.

Telephone companies sell us voice plans because they know we're not going to use them. We're hiding from each other. People say that calls aren't efficient, but trying to bring efficiency into your intimacy can get you into a lot of trouble.

There's a lot of research that indicates the brain rewards us for multi-tasking by giving us a shot of neurochemicals whenever we start a new task. Our brain rewards us even as our performance in every task degrades. We don't even notice that our performance is bad. We don't care. We feel like masters of the universe because our brain is chemically rewarding us for multi-tasking.

What is so seductive about texting, about keeping that phone on, about that little red light on the BlackBerry, is you want to know who wants you.

One thing is certain: the riddle of mind, long a topic for philosophers, has taken on new urgency. Under pressure from the computer, the question of mind in relation to machine is becoming a central cultural preoccupation. It is becoming for us what sex was to the Victorians--threat and obsession, taboo and fascination.

Does virtual intimacy degrade our experience of the other kind and, indeed, of all encounters, of any kind?