Belonging is declining and belief is changing. With increased globalization and modernization reaching into the furthest corners of the earth also comes the influence of secularization. These three tides of influence impact traditional religious beliefs, practices, and institutions in significant ways. Some modernizing societies see religion on the decline, while others find it thriving in surprising ways. This collection of essays presents the opportunities and the challenges of secularization for the mission of the Church, with hopeful signs and reassurance that God is still at work in a secularizing world. Readers will find both analysis and guidance that will assist the Church in an informed, missional engagement with secularization in a variety of contexts—starting with North America, then Europe, Asia, and Africa. Each local church and mission organization must discern the appropriate missional response for evangelism, discipleship, congregational life, and social involvement. To be Against the Tide means regaining your voice, as a church on mission, informed by your context and inspired by the responses of others in theirs.