Kelden Amadiro

Kelden Amadiro is a Spacer and the main antagonist in the novels The Robots of Dawn and Robots and Empire. He is the head of the Robotics Institute on Aurora. He is known for being extremely against the expansion of Earth to other planets, and in the end even tries to destroy the Earth by speeding up the rate of radiation in its crust. His memory of this is erased by R. Giskard Reventlov; however Giskard allows Levular Mandamus to proceed because his motives were more beneficial for humanity and were therefore allowable by the Zeroth Law of Robotics (which was developed by R. Daneel Olivaw): since a slow increase in the rate of radiation would drive Earthpeople to the outer worlds, but a quick increase like Amadiro wanted, would kill the Earth with its population still on it.