“Probably the most common—and damaging—misunderstanding about personality type is that introverts are antisocial and extroverts are pro-social. But as we’ve seen, neither formulation is correct; introverts and extroverts are differently social. Why do we accept this one-size-fits-all situation as a given when we know perfectly well that adults don’t organize themselves this way? We often marvel at how introverted, geeky kids “blossom” into secure and happy adults. We liken it to a metamorphosis. However, maybe it’s not the children who change but their environments. As adults, they get to select the careers, spouses, and social circles that suit them. They don’t have to live in whatever culture they’re plunked into. Research from a field known as “person-environment fit” shows that people flourish when, in the words of psychologist Brian Little, they’re “engaged in occupations, roles or settings that are concordant with their personalities.” The inverse is also true: kids stop learning when they feel emotionally threatened.”