communication overload—the feeling that you can never keep up with all the different incoming requests for your time and attention—conflicts with our ancient social wiring, leading to unhappiness in the short term and burnout in the long term.

Most knowledge workers avoid the uncomfortable strain of deliberate practice like the plague, a reality emphasized by the typical cubicle dweller’s obsessive e-mail–checking habit—for what is this behavior if not an escape from work that’s more mentally demanding?

This mind-set provides another explanation for the popularity of many depth-destroying behaviors. If you send and answer e-mails at all hours, if you schedule and attend meetings constantly, if you weigh in on instant message systems like Hall within seconds when someone poses a new question, or if you roam your open office bouncing ideas off all w