Veli-Matti Kärkkäinen (Dr.Theol.Habil., University of Helsinki) is professor of systematic theology at Fuller Theological Seminary in Pasadena, California, and docent of ecumenics at the University of Helsinki. He is ordained by the Evangelical Lutheran Church of America and is also an expert on Pentecostal/charismatic movements. He has served as visiting professor in various schools around the world and has participated in numerous international theological, missiological, and interfaith consultations. His many books include The Trinity: Global Perspectives, An Introduction to the Theology of Religions, and the five-volume series A Constructive Christian Theology for the Pluralistic World.