Abstract

In God Emperor of Dune, Leto II explains to Moneo why people destroyed thinking machines in the Butlerian Jihad: "Humans had set those machines to usurp our sense of beauty, our necessary selfdom out of which we make living judgments." The Orange Catholic Bible (OCB), the key religious text in the Dune universe, forbids the creation of machines that imitate human thinking: "Thou shalt not make a machine in the likeness of a man's mind." The OCB focuses on human mental abilities – especially computation, reason, and logic – that have a status that machines should not emulate. In Frank Herbert's universe, divine imitation and creation are presented in conflicting ways: on the one hand, they are strictly prohibited, on the other, they are aspirations for key characters. Mentats replace machines by use of hard, cold, logical thinking and reasoning with machine‐like efficiency.