Despite these European connections, Unitarianism as we know it in North America is not a foreign import. In fact, the origins of our faith began with some of the most historic congregations in Puritan New England where each town was required to establish a congregationally independent church that followed Calvinist doctrines. Initially these congregational churches offered no religious choice for their parishioners, but over time the strict doctrines of original sin and predestination began to mellow.
By the mid-1700s a group of evangelicals were calling for the revival of Puritan orthodoxy. They asserted their belief in humanity’s eternal bondage to sin. People who opposed the revival, believing in free human will and the loving benevolence of God, eventually became Unitarian. During the first four decades of the nineteenth century, hundreds of these original congregational churches fought over ideas about sin and salvation, and especially over the doctrine of the Trinity. Most of the churches split over these issues. In 1819, Unitarian minister William Ellery Channing delivered a sermon called “Unitarian Christianity” and helped to give the Unitarians a strong platform. Six years later the American Unitarian Association was organized in Boston, MA.