Business leaders often look to social activities to generate ideas and innovation, from group collaboration and brainstorming to large meetings and open-format offices. Those who are highly verbal, bold and outgoing often thrive in these environments, in which thinking on your feet and speaking up are valued. In Quiet: The Power of Introverts in a World That Can’t Stop Talking , author Susan Cain draws on research to challenge the “Extrovert Ideal” and many of our most common business practices in which the ideas and leadership potential of introverts are often overlooked. Among the researchers she cites is Wharton management professor Adam Grant, who published a paper in the Academy of Management Journal titled, “ Reversing the Extraverted Leadership Advantage: The Role of Employee Proactivity ,” with coauthors Francesca Gino of Harvard Business School and David Hofmann of the University of North Carolina’s Kenan-Flagler Business School.…