An acclaimed science writer explains why we so often become lost in our most self-defeating thoughts and how to transform this brooding energy into something empowering and productive.

“If you’ve ever wondered why your mind sometimes gets the best of you, and you are hungry for science-based tools to stop overthinking, this book is for you.”—Ethan Kross, bestselling author of Shift and Chatter

Why’d I do that? He’s such a jerk! I’m...