Longing is the great human state. - Susan Cain

Mark Twain once told a story about a man who scoured the planet looking for the greatest general who ever lived. When the man was informed that the person he sought had already died and gone to heaven, he made a trip to the Pearly Gates to look for him. Saint Peter pointed at a regular-looking Joe. “That isn’t the greatest of all generals,” protested the man. “I knew that person when he lived on Earth, and he was only a cobbler.” “I know that,” said Saint Peter, “but if he had been a general, he would have been the greatest of them all.

INTROVERTS are especially vulnerable to challenges like marital tension, a parent’s death, or abuse. They’re more likely than their peers to react to these events with depression, anxiety, and shyness. Indeed, about a quarter of Kagan’s high-reactive kids suffer from some degree of the condition known as “social anxiety disorder,” a chronic and disabling form of shyness.

This is the next great diversity issue of our time.