David Berreby is a science writer and the author of Us and Them: The Science of Identity. His work has appeared in Psychology Today, The New Yorker, The New York Times Magazine, Nature, Smithsonian, Aeon, Nautilus and many other publications.
It’s increasingly common for someone to be diagnosed with a condition such as ADHD or autism as an adult. A diagnosis often brings relief, but it can also come with as many questions as answers.