“In the first study, Grant and his colleagues analyzed data from one of the five biggest pizza chains in the United States. They discovered that the weekly profits of the stores managed by extroverts were 16 percent higher than the profits of those led by introverts—but only when the employees were passive types who tended to do their job without exercising initiative. Introverted leaders had the exact opposite results. When they worked with employees who actively tried to improve work procedures, their stores outperformed those led by extroverts by more than 14 percent.”

“Introverts almost never cause me trouble and are usually much better at what they do than extroverts. Extroverts are too busy slapping one another on the back, team building, and making fun of introverts to get much done. Extroverts are amazed and baffled by how much some introverts get done and assume that they, the extroverts, are somehow responsible.”

“Secondly, extroverts often incorrectly assume that introverts are suffering. Introverts internalize problems; we like to take things inside and work on them there. Extroverts prefer to externalize and deal with problems interactively. Because of this difference, introverts may seem psychologically burdened, while extroverts spread the burden around and seem healthier—from an extroverted standpoint. But note that I said introverts like to take problems inside. Sure, an introvert can overdo it, but so can the extrovert who feels compelled to express every unresolved thought or emotion. The former gets depressed or anxious and goes to therapy; the latter sends others to therapy.”

“While the introvert is reflecting on the question (thinking first), the extrovert takes this as an invitation to fill the void (talking first). As long as the introvert doesn’t interrupt, the extrovert continues to fill the interpersonal space with talk. But as long as the extrovert talks, the introvert can’t think and stays mute. Mute means the invitation is still open, and continued talk assures that the introvert remains mute. By the time the extrovert pauses to ask, the introvert’s head is pounding and he or she just wants to get out so she can think. The extrovert just assumes the introvert had nothing to say, and moves on.”

“An organization will tend to grow only when the advantages that can be gotten from directing the work of additional employees are less than the transaction costs of managing them.”

“In an extroverted society, the difference between an introvert and an extrovert is that an introvert is often unconsciously deemed guilty until proven innocent.”