Deism in England and France in the 18th century

Deism, the religious attitude typical of the Enlightenment, especially in France and England, holds that the only way the existence of God can be proven is to combine the application of reason with observation of the world. A Deist is defined as "One who believes in the existence of a God or Supreme Being but denies revealed religion, basing his belief on the light of nature and reason." Deism was often synonymous with so-called natural religion because its principles are drawn from nature and human reasoning.

Source: Wikipedia — Deism in England and France in the 18th century (CC BY-SA 4.0)