How did people in ancient times think about how the world originated?

In ancient times, people imagined that the world was created by a powerful creature, which they called a god. In the ancient Egyptians, the god Pta created the world, among the ancient Slavs the creator of the world was Stribog, among the ancient Sumerians Enki played such a role, among the ancient Hindus it was the god Brahma. Also, ancient people believed that the world is actually flat. They imagined that he was standing on three elephants and a turtle.