Sure, modern humans are stressed. More stressed than ever before, according to the American Psychological Association. But we don’t suffer from the type of acute stresses humans fretted over for millions of years. Most of us don’t experience physical stresses like feeling intense hunger, exhaustion from running down food, carrying heavy loads, or exposing ourselves to freak germs and wild temperature swings. Nor do we suffer from mental stresses like wondering where our next meal is coming from, fearing fanged predators, or dreading that a little nick could get infected and kill us off in a
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