David Kinnaman is president of The Barna Group, which provides research and resources that facilitate spiritual transformation in people's lives. Since joining Barna in 1995, David has designed and analyzed nearly five hundred studies for a variety of churches, nonprofits, and corporations. He and George Barna write a free research report published online at www.barna.org. David and his wife Jill have three children and live in Ventura, California. Gabe Lyons founded Fermi Project, a broad collective of innovators, social entrepreneurs, and church and society leaders working together to make positive contributions to culture (www.fermiproject.com). Prior to Fermi Project, Gabe cofounded Catalyst, a national gathering of young leaders, while serving as vice president for John Maxwell's INJOY organization. Gabe, his wife Rebekah, and their three children reside in Atlanta, Georgia. To meet the contributors and learn more about this book and the conversations it is creating, visit www.unchristian.com. This work was commissioned by Fermi Project.