Scott Thumma, Ph.D., is professor of sociology of religion at Hartford Seminary and researcher at Hartford Institute for Religion Research. Scott is recognized as a leading researcher and writer on congregational studies. He is also editor of the Lilly Endowment funded website Insights into Religion. Warren Bird, Ph.D., is director of research and intellectual capital development for Leadership Network. An ordained minister, he serves as an adjunct faculty member at Alliance Theological Seminary. Warren has coauthored 22 books including Culture Shift and Viral Churches, both from Jossey-Bass.