But ordinary IQ can’t be the whole story, because we have cheap and fast tests to reveal IQ. More to the point, however, raw intelligence can only take you so far. If you’re smart but lazy, for example, your intelligence won’t be worth very much to your employer. As Caplan argues, the best employees have a whole bundle of attributes—including intelligence, of course, but also conscientiousness, attention to detail, a strong work ethic, and a willingness to conform to expectations.
