One of the most important questions people ask themselves when they enter a new setting, whether a school, a workplace, or a country, is "Do I belong here?". How do people make sense of their belonging in a new setting? How and why do group identities, such as race-ethnicity, social-class background, gender, or national origin matter? What are the consequences of people's inferences about their belonging? And how can we create school and work settings in which people from diverse backgrounds can genuinely and authentically belong?