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.

We often marvel at how introverted, geeky, kid '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'er plunked into.

I'm not saying abolish group work - I think there's a time and a place for people to come together and exchange ideas, but let's restore the respect we once had for solitude. And we need to be much more mindful of the way we come together.

As a young boy, Charles Darwin made friends easily but preferred to spend his time taking long, solitary nature walks. (As an adult he was no different. “My dear Mr. Babbage,” he wrote to the famous mathematician who had invited him to a dinner party, “I am very much obliged to you for sending me cards for your parties, but I am afraid of accepting them, for I should meet some people there, to whom I have sworn by all the saints in Heaven, I never go out.”)

The pressure to entertain, to sell ourselves, and never to be visibly anxious keeps ratcheting up.

Spend your free time the way you like, not the way you think you're supposed to. Stay home on New Year's Eve if that's what makes you happy. Skip the committee meeting. Cross the street to avoid making aimless chitchat with random acquaintances. Read. Cook. Run. Write a story. Make a deal with yourself that you'll attend a set number of social events in exchange for not feeling guilty when you beg off.

We know from myths and fairy tales that there are many different kinds of powers in this world. One child is given a light saber, another a wizard's education. The trick is not to amass all the different kinds of power, but to use well the kind you've been granted.