Nick Fish is president of American Atheists, an organization that advocates on behalf of nonreligious Americans in the public square.

Ryan Claassen is a professor of political science at Kent State University. He is the author of Godless Democrats and Pious Republicans? Party Activists, Party Capture and the “God Gap.”

Lucas Swanepoel is the vice president for social policy for Catholic Charities USA. Contact him through Patricia Cole.

Neal Denton is the chief government affairs officer for the YMCA. He previously served as the senior vice president for government relations and strategic partnerships for the American National Red Cross.

Claire Bonham is the strategic lead for volunteering for The Salvation Army United Kingdom.

Jason Mankey is a pagan writer and lecturer. He writes a blog on paganism for Patheos, exploring related rituals, history and holidays.

Helen A. Berger is a sociologist at Brandeis University. She studies gender and new religions, with a focus on paganism and witchcraft.

Kathleen A. Green is the executive director of the Yale Humanist Community. Yale Humanists worked with the city of New Haven to add a humanist monument to the group of religious symbols displayed downtown each December.