Carson is passionate about international ministry and seeking the unity of the church worldwide. For a number of years, he served the World Evangelical Alliance working in the Faith and Church Study Unit. During his time chairing the Faith and Church Study Unit, Carson promoted evangelical scholarship across the world. He encouraged scholars and pastors from Nigeria, Indonesia, Japan, India, Europe, and across the world to write about global solutions for problems facing the church. Under his tenure at the World Evangelical Alliance, he produced four volumes containing contributions from international scholars.