R. Giskard Reventlov 1300-1500

With R. Daneel Olivaw he created the "Zeroth Law of Robotics," an extension/modification of the Three Laws of Robotics, which helped him prevent Kelden Amadiro's destruction of the Earth—though the same law led him to allow a gradual destruction of the Earth through radioactive increases, which would encourage the colonization of the Galaxy. Just before he shuts down, he transfers his telepathic abilities to R. Daneel Olivaw.