The Memory of Earth (1992) is a science fiction novel by American writer Orson Scott Card.
In order not to repeat the mistakes that led to the destruction of civilization on Earth, a computer, known as the Oversoul, was left as guardian of this planet.
Its main mission was to prevent humans from developing technologies that could make wars a global affair.
The Oversoul uses this connection to make humans quite easily distracted when thinking about forbidden technologies, leading them to forget that train of thought.
Nafai, Elemak and Mebbekew, his older half brothers, Issib and his father Volemak are eventually forced to leave the city.