Kelden Amadiro
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Kelden Amadiro is a fictional character that appears in the novels The Robots of Dawn and Robots and Empire by Isaac Asimov. He is the head of the Robotics Institute on Aurora, a Spacer world. He is most known for being extremely against the expansion of Earthmen to other planets, and in the end even tries to destroy the earth by speeding up the rate of radiation in the Earth's crust. He has his memory (of the plot) erased on Earth by R. Giskard Reventlov when he and R. Daneel Olivaw were accompanying Gladia Delmarre on Earth. The robots, however, allow Levular Mandamus to destroy the Earth because his motives were more beneficial for humanity and were therefore allowable by the Zeroth Law of Robotics: a slow increase in the rate of radiation would drive Earthpeople to the outer worlds, but a quick death, what Amadiro wanted, would kill the Earth with its population still on it.