Next to Smith, Rigdon was the most influential early Mormon. He imported Reformed Baptist teachings into Latter-day Saint theology, wrote the canonized Lectures on Faith, championed communalism and isolationism, and delivered many of the most significant early sermons, including the famous Salt Sermon and the Ohio temple dedicatory address.

Following Smith's death, Rigdon parted company with Brigham Young to lead his own group of some 500 secessionists Mormons in Pennsylvania. Rigdon's following gradually dwindled, as the one-time orator took to wandering the streets, taunting indifferent passersby with God's word. He was later recruited by another Mormon faction. Although he refused to meet with them, he agreed to be their prophet and send revelations by mail. Before long he had directed them to settle far-off Iowa and Manitoba, among other things. At his death, his followers numbered in the hundreds, and today they number about 10,000, mostly in Pennsylvania.

"Rigdon is a biographer's dream," writes Richard Van Wagoner. Intellectually gifted, manic-depressive, an eloquent orator and social innovator but a chronic indigent, Rigdon aspired to altruism but demanded advantage and deference. When he lost prominence, his early attainments were virtually written out of the historical record.

Correcting this void, Van Wagoner has woven the psychology of religious incontinence into the larger fabric of social history. In doing so, he reminds readers of the significance of this nearly-forgotten founding member of the LDS First Presidency. Nearly ten million members in over one hundred churches trace their heritage to Joseph Smith. Many are unaware of the importance of Rigdon's contributions to their inherited theology.

Richard S. Van Wagoner, M.S., Brigham Young University, is a clinical audiologist and Lehi city historian. He is the author of Lehi: Portraits of a Utah Town, Mormon Polygamy: A History, and Sidney Rigdon: A Portrait of Religious Excess; and the co-author of A Book of Mormons. He has been published in Brigham Young University Studies, Dialogue: A Journal of Mormon Thought, Sunstone, Utah Historical Quarterly, and Utah Holiday, and has won awards from the Dialogue Foundation, John Whitmer Historical Association, and the Mormon History Association. He is a contributor to The Prophet Puzzle: Interpretive Essays on Joseph Smith.