This is Gallup’s first report of public perceptions vis-à-vis people of different faiths. This analysis provides the reader with insight into the state of relations between people of different religions spanning four continents. The report also explores attitudes and perceptions among Muslims and the general public in France, Germany, and the United Kingdom about issues of coexistence, integration, values, identity, and radicalization. The Gallup Coexist Index is designed to measure global attitudes toward people from different faith traditions. The Index is based on respondents’ level of agreement with five statements on a scale of “1” (strongly disagree) to “5” (strongly agree) concerning attitudes toward, and interactions with, people of other religions. Depending on their answers, Gallup classifies populations as isolated, tolerant, or integrated. A detailed analysis of the items that make up the Gallup Coexist Index in these three countries reveals important information to help inform the integration debate.