Does power sharing bring peace? Policymakers around the world seem to think so. Yet, while there are many successful examples of power sharing in multi-ethnic states, such as Switzerland, South Africa and Indonesia, other instances show that such arrangements offer no guarantee against violent conflict, including Rwanda, Yugoslavia, Zimbabwe and South Sudan. Given this mixed record, it is not surprising that scholars disagree as to whether power sharing actually reduces conflict. Based on systematic data and innovative methods, this book comes to a mostly positive conclusion by focusing on practices rather than merely formal institutions, studying power sharing's preventive effect, analyzing how power sharing is invoked in anticipation of conflict, and by showing that territorial power sharing can be effective if combined with inclusion at the center. The authors' findings demonstrate that power sharing is usually the best option to reduce and prevent civil conflict in divided states.