Mb Soft
Believe: Unitarianism
This essay covers the history of Unitarianism along with some of the beliefs of Unitarian Christianity.
Wikimedia
Wikipedia: Unitarianism
Wikipedia offers detailed information on the theological doctrine of Unitarianism, including how it is used in many different countries.
Independence Hall Association
U.s. History: Religious Revival: The "Social Gospel"
Social reform and teaching in the church which reflected social reform joined forces in latter part of the 19th century. Read about how an urban revivalist movement addressed such problems as poverty, child labor, and working conditions.