In February 2006, a council of prominent Evangelical Christians signed a mission statement dedicated to the preservation of the only earth God gave us. Among the signatories were the Rev. Rick Warren (author of The Purpose-Driven Life and pastor of the country's largest church), David Neff (editor of Christianity Today), W. Todd Bassett (national commander of the Salvation Army), and the Rev. Berten A. Waggoner of Sugar Land, Texas.