The Common Word initiative was commenced by leading Islamic scholars as outreach to the Christian world following Pope Benedict XVI’s controversial 2007 Regensburg address. Can the Islamic and Christian communities agree on love of God and love of neighbor as common beliefs? This book distinguishes between theory and application to capture issues in comparative theology and different views of common global challenges like the environment, development, and human rights. Muslims and Christians together constitute more than half of the world’s population. There can be no meaningful progress on such crucial issues without peace and justice between these two communities.