Belief in God based entirely on reason, without any reference to faith, revelation, or institutional religion. During the seventeenth and eighteenth centuries, advances in the natural sciences often fostered confidence that the regularity of nature reflects the benevolence of a divine providence. This confidence, together with a widespread distrust of the church, made deism a popular view in England and on the continent. Thus, in distinct ways, Toland, Lord Herbert, Paine, Rousseau, and Voltaire were all deists.
(Via Philosophical Dictionary)
Has deism now taken a moral, therapeutic turn?