Through the teaching of John Thomas and the need in the American Civil War for a name, the Christadelphians emerged as a denomination, but they were formed into a lasting structure through a passionate follower of Thomas's interpretation of the Bible, Robert Roberts. In 1864, he began to publish "The Ambassador of the Coming Age" magazine. John Thomas, out of concern that someone else might start a publication and call it "The Christadelphian", urged Robert Roberts to change the name of his magazine to "The Christadelphian", which he did in 1869. His editorship of the magazine continued with some assistance until his death in 1898. In church matters, Roberts was prominent in the period following the death of John Thomas in 1871, and helped craft the structures of the Christadelphian body.