“Emotion goes inside-out. Emotional contagion, though, suggests that the opposite is also true. If I can make you smile, I can make you happy. If I can make you frown, I can make you sad. Emotion, in this sense, goes outside-in.”

British-Canadian journalist, author, and public speaker

Malcolm Gladwell is a British-Canadian journalist, author, and public speaker. He has been a staff writer for The New Yorker since 1996, and he is known for books that bring ideas from social science, business, and culture to a wide general audience. He has published eight books. He also hosts the podcast Revisionist History and co-founded Pushkin Industries, a podcast company. His work often looks at why people and institutions think and behave as they do.