“If you’re an introvert, you also know that the bias against quiet can cause deep psychic pain. As a child you might have overheard your parents apologize for your shyness. (“Why can’t you be more like the Kennedy boys?” the Camelot-besotted parents of one man I interviewed repeatedly asked him.) Or at school you might have been prodded to come “out of your shell”—that noxious expression which fails to appreciate that some animals naturally carry shelter everywhere they go, and that some humans are just the same. “All the comments from childhood still ring in my ears, that I was lazy, stupid, slow, boring,” writes a member of an e-mail list called Introvert Retreat. “By the time I was old enough to figure out that I was simply introverted, it was a part of my being, the assumption that there is something inherently wrong with me. I wish I could find that little vestige of doubt and remove it.” Now that you’re an adult, you might still feel a pang of guilt when you decline a dinner invitation in favor of a good book. Or maybe you like to eat alone in restaurants and could do without the pitying looks from fellow diners. Or you’re told that you’re “in your head too much,” a phrase that’s often deployed against the quiet and cerebral. Of course, there’s another word for such people: thinkers.”