Deism (i/ˈdiː.ɪzəm/ or /ˈdeɪ.ɪzəm/) is a religious philosophy which holds that reason and observation of the natural world, without the need for organized religion, can determine that the universe is the product of a creator. According to deists, God never intervenes in human affairs or suspends the natural laws of the universe. Deists typically reject supernatural events such as prophecy and miracles, tending instead to assert that a god (or "the Supreme Architect") does not alter the universe by intervening in it. This idea is also known as theclockwork universe theory, in which a god designs and builds the universe, but steps aside to let it run on its own. Two main forms of deism currently exist: classical deism and modern deism.
The earliest known usage in print of the English term deist is 1621, and deism is first found in a 1675 dictionary. Deism became more prominent in the 17th and 18th centuries during the Age of Enlightenment—especially in Britain, France, Germany and America among intellectuals raised as Christians who found they could not believe in supernatural miracles, the inerrancy of scriptures, or the Trinity, but who did believe in one God. Deistic ideas also influenced several leaders of the American and French Revolutions.