(also: Unitarian Universalist; UU) The Unitarian Universalist Association came into being in 1961 through the union of two communities of faith: the Unitarians who stressed the oneness of God and the Universalists who insisted on universal salvation. Both movements became popular in 18th- and 19th-century America, especially in the northeastern states. The two groups were both involved in issues of social justice and social action. These similarities, combined with a shared commitment to freedom of religious belief and expression, led the two groups to their eventual merger. Today the Association is perhaps best known for the independence of its member churches and its belief that truth is not the exclusive domain of any single scripture or creed.