The Farmer’s Almanac has an interesting tale on the Man in the Moon Myth. The oldest variant is from the Old Testament and claims that he is Cain the Wanderer, forever doomed to circle the earth.Moon for fratricide. The reasoning is based on Genesis chapter 4, is that while he is doomed for his anger and must want the earth like a vagrant, no one can reach out and strike him. It does makes sense, for if the Moon was destroyed, the Earth would shortly follow because it stabilizes the gravitational wobble and that is necessary for regular months (no months no lunation cycle) and seasons. The sky would also be dark at night affecting nocturnal animals and the tides could get so erratic that tsunamis maybe more common. Whoever he is, we Earthlings, definitely need him.
9 Then the Lord said to Cain, “Where is Abel your brother?” And he said, “I do not know. Am I my brother’s keeper?”
10 He said, “What have you done? The voice of your brother’s blood is crying to Me from the ground.
11 “Now you are cursed from the ground, which has opened its mouth to receive your brother’s blood from your hand.
12 “When you cultivate the ground, it will no longer yield its strength to you; you will be a vagrant and a wanderer on the earth.”
13 Cain said to the Lord, “My punishment is too great to bear!
14 “Behold, You have driven me this day from the face of the ground; and from Your face I will be hidden, and I will be a vagrant and a wanderer on the earth, and whoever finds me will kill me.”
15 So the Lord said to him, “Therefore whoever kills Cain, vengeance will be taken on him seven-fold.” And the Lord gave a sign for Cain, so that no one finding him would slay him.