The Gospel Coalition (TGC) is a broad collection of churches, church leaders, and Christians originally founded by Timothy Keller and D.A. Carson. The organization is distinguished by its emphasis on actively engaging the culture, and it provides an abundant amount of resource materials such as videos, books, and study guides. As the term coalition implies, The Gospel Coalition includes a diversity of Christians from different denominations. Doctrinally, the association is generally aligned with evangelical and Reformed perspectives ^a). Other well-known figures associated with the organization are Erwin Lutzer, Alistair Begg, Albert Mohler, David Platt, John Piper, and Russell Moore.