Ralph D. Winter

Ralph D. Winter was a prominent American theologian and missionary leader known for his work in the field of missions and church growth. He played a significant role in the development of the "unreached people group" concept, which emphasizes focusing evangelistic efforts on communities with little or no access to the Christian faith. Winter founded the U.S. Center for World Mission, which aimed to mobilize resources for global evangelism. His influential ideas have shaped modern missionary strategies, encouraging a greater understanding of cultural contexts and the importance of reaching diverse populations around the world.