An essential overview of the science behind stereotypes: from why our brains form them to how recognizing them can help us be less biased. From the time we’re babies, our brains constantly sort and label the world around us — a skill that’s crucial for our survival. But, as adolescents are all too aware, there’s a tremendous downside: when we do this to groups of people it can cause great harm. Here’s a comprehensive introduction to the science behind stereotypes that will help young people make sense of why we classify people, and how we can change our thinking.