The purpose of this research is to create a comprehensive historical work on the Church of God in Christ, while highlighting the formation, development, and transition of the only Black mainstream church body in America that was solely founded, organized, and fully controlled by African-Americans. This research seeks to give the COGIC audience a realistic perspective on their history and on the impact of the Church on the world of Christendom. I recapped the contributions of COGIC and its influence on the contemporary mega-church movement and gospel music. Additionally, the COGIC Church impacted the American religious landscape by being a multiracial denomination that had a great populist appeal among the rural and urban poor which assisted the phenomenal growth in membership, making it the second largest African-American Christian organization in the world.