In the late 1820s a fiery young minister in western Ohio converted nearly 1,000 proselytes to the Reformed Baptist Movement. As these schismatics organized themselves into the new Disciples of Christ church, the Reverend Sidney Rigdon was already aligning himself with another, more radical movement, the Latter-day Saints, where he quickly became the LDS prophet's principal advisor and spokesman. He served Joseph Smith loyally for the next fourteen...