Rebekka King is an assistant professor of philosophy and religious studies at Middle Tennessee State University, where she teaches courses on global Christianity, Islam and Judaism. Her research focuses on the secular and religious elements of progressive Christianity. She is co-chair of the American Academy of Religion’s Sociology of Religion program unit.

Michael Hout is director of the Center for Advanced Social Science Research at New York University, where he also teaches sociology. He has studied and written on the rise of the nonreligious and is the author or co-author of multiple books, including Century of Difference: How America Changed in the Last One Hundred Years.

Bethamie Horowitz is co-director of the programs in education and Jewish studies at New York University. She also has a research and consulting practice and has spent the last two decades tracking major issues facing the Jewish community.

Rachel Heath is a doctoral candidate at Vanderbilt University, where she researches multiple religious belonging.

Conrad Hackett is Pew Research Center’s associate director of research and senior demographer. Contact him through Anna Schiller.

Mary Gautier is a senior research associate with the Center for Applied Research in the Apostolate, which studies Catholic demographic trends.

Daniel Cox is director of the Survey Center on American Life and a senior fellow in polling and public opinion with American Enterprise Institute. He previously served as research director for Public Religion Research Institute.

Rebecca Catto is an assistant professor of sociology at Kent State University in Ohio. She studies the interplay between religion and secularism in North America and Europe.

Ryan Burge studies the intersection of religious beliefs and political behavior and is an expert on survey methodology. He has spoken to the media on a range of topics, including religious affiliation and the rise of the “nones.” He teaches political science at Eastern Illinois University.