More than 100 million people worldwide are now forcibly displaced from their homes, the most in modern history. The majority are internally displaced people (IDPs), those who have been uprooted but remain in their own countries. While some of the emergencies that force people to flee are well-documented, many more are unfolding largely outside the headlines. Here, we highlight some of the world’s largest displacement crises—and how Doctors Without Borders/Médecins Sans Frontières (MSF) is responding.