The correct answer is: Akhenaten (also known as "Akhenaton" and "Amenhotep IV")
Explanation:
The pharaoh Akhenaten worshiped only the god sun, Aten, rather than following the polytheistic tradition of the Egyptian people. He even changed his own name from Amunhotep to Akhenaten, in honour of the god.
He tried to install this new system, but was largely rejected by his people. After his death, most of the works of art and architecture from his reign were destroyed and the Egyptians returned to their old religious system.
By making the civil war only about the preservation of slavery against abolitionists. Though this was one reason, It was originally started because they felt that the federal government was being unfair and unjust towards them in the way that they taxed them.