This report was produced by Pew Research Center as part of the Pew-Templeton Global Religious Futures project, which analyzes religious change and its impact on societies around the world. Funding for the Global Religious Futures project comes from The Pew Charitable Trusts and the John Templeton Foundation (grant 62287). Find related reports online at https://www.pewresearch.org/globalreligiousfutures.
This report is a collaborative effort based on input from and analysis by the following individuals from Pew Research Center and the Center for Advanced Studies of Population and Religion (CASPAR) at Krakow University of Economics.
Primary researchers
Conrad Hackett, Associate Director of Research and Senior Demographer, Pew Research Center
Marcin Stonawski, Director of CASPAR
Yunping Tong, Research Associate, Pew Research Center
Stephanie Kramer, Senior Researcher, Pew Research Center
Anne Shi, Senior Researcher, Pew Research Center
Research team
Alan Cooperman, Director of Religion Research, Pew Research Center
Joanna Sikorska, Research Assistant, CASPAR
Krystian Fejkiel, Research Assistant, CASPAR
Michał Bożek, Research Assistant, CASPAR
Maciej Laburda, Research Assistant, CASPAR
Krzysztof Kiecoń, Research Assistant, CASPAR
Editorial and graphic design
Dalia Fahmy, Senior Writer and Editor, Pew Research Center
Rebecca Leppert, Copy Editor, Pew Research Center
Bill Webster, Senior Information Graphics Designer, Pew Research Center
Communications and web publishing
Hannah Taber, Communications Manager, Pew Research Center
Maya Pottiger, Communications Associate, Pew Research Center
Justine Coleman, Associate Digital Producer, Pew Research Center
Nick Zanetti, Associate Engineer, Pew Research Center
Others at Pew Research Center who provided guidance include Caileigh Stirling, former research associate; Matthew Conrad, former graduate student intern; Isaac Lamoreaux, former undergraduate student intern; Andrew Mercer, senior research methodologist; Gregory A. Smith, senior associate director of research; Arnold Lau, research methodologist; Becka A. Alper, senior researcher; Jonathan Evans, senior researcher; Kirsten Lesage, research associate; Kelsey Jo Starr, research analyst; William Miner, research analyst; Manolo Corichi, research analyst; and Samirah Majumdar, research associate.
The following former research assistants at CASPAR helped to collect and standardize religious composition data: Małgorzata Jedynak, Gisella Lopez, Przemysław Wojno, Bartosz Tyrała, and Karolina Kosmala.
The Center also received valuable input from numerous social scientists, including Yair Assaf-Shapira, Head of Data Analysis and Services and Senior Researcher, Jerusalem Institute for Policy Research, Israel; Valentina Pereira Arena, Professor, Catholic University of Uruguay, Uruguay; Roberto Cipriani, Professor Emeritus of Sociology at Roma Tre University; Néstor Da Costa, Professor, Catholic University of Uruguay, Uruguay; Sergio DellaPergola, Professor Emeritus and former Chairman of The A. Harman Institute of Contemporary Jewry, The Hebrew University of Jerusalem, Israel; Ljiljana Đorđević, Head of Population Census Division, Statistical Office of the Republic of Serbia; Juan Cruz Esquivel, Senior Researcher at the National Scientific and Technical Research Council and Main Professor of Methodology of Social Research at the University of Buenos Aires, Argentina; Erling Häggström Gunfridsson, Associate Professor of Population Studies, Umeå University, Sweden; Francesco Benvenuto Molteni, Researcher, University of Milan, Italy; Eric Morier-Genoud, Professor, Queen’s University Belfast, Northern Ireland; Michaela Potančoková, Senior Research Scholar, International Institute for Applied Systems Analysis, Austria; Atko Remmel, Associate Professor, University of Tartu, Estonia; Roberta Ricucci, Associate Professor, Department of Cultures, Politics and Society, University of Torino, Italy; Triin Roosalu, Associate Professor of Sociology, Tallinn University, Estonia; Niel Roux, Director of Service Delivery Statistics, Statistics South Africa, South Africa; Kobus Schoeman, Emeritus Professor, University of the Free State, South Africa; John Shaver, Associate Professor, Baylor University, United States; Patrick Simon, Senior Researcher, French Institute for Demographic Studies, France; Ventsislava Stoyanova, Assistant Professor, University of National and World Economy, Bulgaria; and Sam Hyun Yoo, Associate Professor, Hanyang University, South Korea.
Recommended Citation: Hackett, Conrad, Marcin Stonawski, Yunping Tong, Stephanie Kramer, Anne Shi and Dalia Fahmy. 2025. “How the Global Religious Landscape Changed From 2010 to 2020.” Pew Research Center. doi: 10.58094/fj71-ny11.
