Specifically the liberal Protestant denomination active in the United States and Canada, starting first as an organized movement in the 18th century and achieving denominational status in the 19th century. Its basic and defining belief was in the salvation of all souls, rejecting the Calvinist doctrine of the election of a few and the damnation of many. Other principles included the freedom of individual interpretation, tolerance of diversity, and the inherent worth and dignity of all human beings. In 1961 it merged with "Unitarianism" to form a new denomination "Unitarian Universalism." Use also generally for the doctrine of universal salvation that has appeared at various times in Christian history, starting with the writings of Origen in the third century.