Book excerpt: An award-winning neurologist on the Stone-Age roots of our screen addictions, and what to do about them. The human brain hasn’t changed much since the Stone Age, let alone in the mere thirty years of the Screen Age. That’s why, according to neurologist Richard Cytowic—who, Oliver Sacks observed, “changed the way we think of the human brain”—our brains are so poorly equipped to resist the incursions of Big Tech: They are programmed for the wildly different needs of a prehistoric world. In Your Stone Age Brain in the Screen Age, Cytowic explains exactly how this programming works—from the brain’s point of view. What he reveals in this book shows why we are easily addicted to screen devices; why young, developing brains are particularly vulnerable; why we need silence; and what we can do to push back. In the engaging storytelling style of his popular TED Talk, Cytowic draws an easily comprehensible picture of the Stone Age brain’s workings—the function of neurotransmitters like dopamine in basic instincts for survival such as desire and reward; the role of comparison in emotion, and emotion in competition; and, most significantly, the orienting reflex, one of the unconscious circuits that automatically focus, shift, and sustain attention. Given this picture, the nature of our susceptibility to digital devices becomes clear, along with the possibility of how to break their spell. Full of practical actions that we can start taking right away, Your Stone Age Brain in the Screen Age offers compelling evidence that we can change the way we use technology, resist its addictive power over us, and take back the control we have lost.