“ Researchers have discovered, for instance, that a brain receptor associated with ADHD is unusually common among certain nomads in Kenya, and that members who have the receptor are the best nourished in the group. It’s possible that we’re all evolving toward a new techno-cognitive nomadism, a rapidly shifting environment in which restlessness will be an advantage again. The deep focusers might even be hampered by having too much attention: Attention Surfeit Hypoactivity Disorder.