Why do we often believe we are right when we are wrong? And why do we panic at a small, harmless spider? And why are we afraid to speak in front of people even though there is no inherent danger whatsoever? And why do we allow ourselves to be deceived by fake news? In the face of this complex and multifaceted reality, we fall prey to approximate estimation, illusion, and error. While these mental mechanisms enable us to construct a coherent view of the world around us, they often strip us of clarity, trap us in our preconceived notions, and create distances between us and others. This book, rich with many real-life examples drawn from everyday life and social psychology stories, makes the latest discoveries in neuroscience accessible to everyone and provides the necessary tools to make our minds work in our favor.