The religious belief system or theological movement centered on the worship of Aten as the supreme or sole deity, particularly during ancient Egypt's 18th Dynasty.
From Aten plus the suffix '-ism' indicating a belief system or doctrine. This term describes the revolutionary monotheistic religion promoted by Pharaoh Akhenaten.
Atenism was essentially the world's first major attempt at monotheism—3,300+ years before modern monotheistic religions, one pharaoh decided the whole religion should center on just one god.
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