Joel A. Carpenter is professor of history and director of the Nagel Institute for the Study of World Christianity at Calvin College. Among his publications are Revive Us Again: The Reawakening of American Fundamentalism (Oxford, 1997); The Changing Face of Christianity: Africa, the West and the World, coedited with Lamin Sanneh (Oxford, 2005); and Walking Together: Christian Thinking and Pubic Affairs in South Africa (Abilene, 2012).
Wilbert R. Shenk is Senior Professor of Mission History and Contemporary Culture, School of Intercultural Studies at Fuller Theological Seminary in Pasadena, California. Among Shenk's recent publications are: North American Foreign Missions, 1810-1914: Theology, Theory, and Policy (2004), By Faith They Went Out: Mennonite Missions, 1850-1999 (2000), and Changing Frontiers of Mission (1999). He was a consulting editor of the Dictionary of Mission Theology: Evangelical Foundations (2007).