People with different backgrounds, experiences, and viewpoints benefit from engaging with each other. That’s why it’s important for people who are insiders to expand their circles to include outsiders, and vice versa. The experience of being an outsider is often influenced by age, religion, ethnicity, gender, race, language, disability, economic class, and other forms of identity. Compared with groups that are more homogeneous, diverse groups do a better job of solving problems, making discoveries, teaching and learning from each other and improving democratic discourse.