Pierre Brechon is an emeritus professor of political science at the Grenoble Institute of Political Studies in France. He co-edited European Values: Trends and Divides Over Thirty Years, which was published in 2017.

Nicolas M. Somma is an associate professor of sociology at the Pontifical Catholic University of Chile. He is co-author of the book Links, Beliefs and Hopes: The Social Cohesion of Latin Americans and a 2017 article on religious change in the region.

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

Michael Wear is chief strategist for the AND Campaign, a Christian organization aimed at building a healthier political culture. He is the author of Reclaiming Hope: Lessons Learned in the Obama White House About the Future of Faith in America.  Wear served as faith outreach director for President Barack Obama’s 2012 reelection campaign.

Sarah M. Levin is the director of governmental affairs for the Secular Coalition for America. She is one of the coordinators of a national effort to form a voting bloc of religious “nones.”

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.”

Matthew Schweich is the deputy director of the Marijuana Policy Project. This organization is working to change marijuana laws across the country by lobbying legislators and coordinating state campaigns. In 2018, Schweich worked on the Utah ballot initiative.

Hannah Hetzer serves as the Drug Policy Alliance’s senior international policy manager. She worked on the campaign that led to marijuana legalization in Uruguay and continues to research related policies around the world.