Today we speak to Dan Tomasulo, the academic director of The Spirituality Mind Body Institute at Columbia University’s Teachers College. But that’s only one of his many talents. Dan is the author of the bestselling books Learned Hopefulness: The Power of Positivity to Overcome Depression and The Positivity Effect, among others. He’s got a PhD in psychology, an MFA in writing, and a Master of Applied Positive Psychology from the University of Pennsylvania. When he’s not running schools or writing books, he edits scholarly journals about psychology. He’s also pretty damn funny, but you can judge the quality of his jokes yourself.

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