Joshua Project is not a formal research organization, but rather seeks to compile and integrate ethnic peoples information from various global, regional and national researchers and workers into a composite whole. Each of these sources may have varying methodologies, standards and levels of accuracy. Therefore, the margin of error may vary from data point to data point. While the data is the best available, numbers should be considered "ballpark."
A special thank-you to Patrick Johnstone of Operation World for his extensive edits of Joshua Project people group data. Early in Joshua Project's history, he invested many hours reviewing people groups, populations and religions information.
Joshua Project is sincerely grateful for the individuals and ministries who have directly or indirectly contributed significant data or help to Joshua Project:
IMB-SBC, Center for the Study of Global Christianity, Bethany World Prayer Center, Harvest Information Standards (HIS), Asia Harvest, Gospel Ambition, Omid, Patrick Johnstone, Jason Mandryk, Luis Bush, Justin Long, Rodrigo Tinoco, Doug Lucas, Adeolu Olanrewaju, John Robb, Samuel Kebreab, Allan Starling, Larry LeGrande, Celeste Aida dos Santos Braga, Willie Botha, George McBane, Ted Limpic, Eveline Verburg, Kerry Olson, Keith Carey, Jim Courson, Susanta Patra, Warren Lawrence, Jerry Falley, Tony Samuel, Amaury Braga, John Sparks, Ted Olsen, Loren Muehlius, Jim Haney, Ted Bergman, Ron Rowland, David Barrett and many other national and onsite researchers and workers.
The viewable data on the Joshua Project website is updated approximately every two weeks.
We are deeply grateful to the above sources which have provided data to Joshua Project. Thank you!