Jonah Berger, a charismatic marketing professor at the Wharton School, and author of the New York Times bestseller Contagious: Why Things Catch On, has spent the past fifteen years studying “social influence” and how it affects our decisions. Jonah shares insights from his latest book: Invisible Influence: The Hidden Forces That Shape Behavior, to show how social influence works, and how we can use these insights to influence others, make smarter decisions, and better understand the mystery of human behavior.