Have you ever gotten into a heated argument about politics? Maybe you’ve said something you're not proud of during game night with friends, or booed the opposing team at a sporting event. Psychologist Mina Cikara studies what happens in these moments — when our mindset shifts from “you and me” to “us and them.” This week on the show, Mina shares the profound ways that becoming a part of a group shapes our thoughts, feelings and behaviors.