In this third volume of his three-volume Intercultural Theology, Henning Wrogemann proposes that we need to go beyond currently trending theologies of mission to formulate both a theory of interreligious relations and a related but methodologically independent theology of interreligious relations. Migratory movements are contributing to an ongoing process of religious pluralization in societies that tended to be more religiously homogenous in the past. Interreligious platforms, movements, and organizations are growing in number. Meanwhile, everyday life continues to be characterized by very different modes of interreligious cooperation. Coming to a better understanding of such modes is a major concern for societies with high levels of religious and cultural plurality.