Answer:
Deism (/ˈdiːɪzəm/ DEE-iz-əm [1][2] or /ˈdeɪ.ɪzəm/ DAY-iz-əm; derived
from Latin "deus" meaning "god") is the philosophical position that rejects revelation as a source of religious knowledge and asserts that reason and observation of the natural world are sufficient to establish the existence of a Supreme Being or creator of the universe.[3][4][5]
At least as far back as Thomas Aquinas, Christian thought has recognized two sources of knowledge of God: revelation and "natural reason". The study of the truths revealed by reason is called natural theology. During the Age of Enlightenment, especially in Britain and France, philosophers began to reject revelation as a source of knowledge and to appeal only to truths that they felt could be established by reason alone. Such philosophers were called "deists" and the philosophical position that they advocated is called "deism".
Deism as a distinct intellectual movement declined toward the end of the 18th century. Some of its tenets continued to live on as part of other intellectual movements, like Unitarianism, and it continues to have advocates today.
