The purpose of this was to prevent the Martians from reverting to a previous state in which they were highly aggressive , on the verge of interstellar conquest .
The purpose of this required flames and the psychic suffering of others in order to reproduce .
The purpose of this was to prevent the Martians from reverting to a previous state in which they were highly aggressive , on the verge of interstellar conquest , and required flames and the psychic suffering of others in order to reproduce .