The attached James Poling (1907 - 1976) article, "Small Church, Big People" succinctly explains what the Unitarian Universalist religion is and what they believe; how are they different from other protestants and what is the origin of the faith.
"In general, Unitarians are highly rational religious liberals who believe in the ethical principles of Jesus while refusing to 'make a God ' of the great Galilean... They think of the Bible not as the revealed Word, but as the single most important volume in the long story of man's religious development. Some Unitarians believe in immortality, others don't. But all agree that the best preparation for whatever the future holds is to live a Christian life here and now."
An enormous list of all the most famous Unitarians is provided.