Todd M. Johnson is Associate Professor of Global Christianity and Director of the Center for the Study of Global Christianity at Gordon-Conwell Theological Seminary in South Hamilton, MA. He is Associate Faculty at Boston University's Institute for Culture, Religion and World Affairs, leading a research project on international religious demography. He has published encyclopedias, atlases, databases, monographs, and scholarly articles on counting religionists around the world. Todd M. Johnson is also Research Fellow in the Study of Global Christianity and Director of the Center for the Study of Global Christianity (CSGC) at Gordon-Conwell Theological Seminary. He is the co-author (with David Barrett and George T. Kurian) of the second edition of the World Christian Encyclopedia (2001) and World Christian Trends (2001). He is editor of the World Christian Database (2007) located at www.worldchristiandatabase.org.