3. Isaac Asimov
Isaac Asimov was a writer and widely considered today as an important figure in “hard” sci-fi. His famous works were the Foundation series, Robot series and Galactic series.
The Foundation Trilogy; Foundation, Foundation and Empire; and Second Foundation describe the decline and rise of a huge interstellar empire. He continued the series with Foundation’s Edge and; Foundation and Earth, before writing two prequel novels. The Three Laws of Robotics in I, Robot (1950) significantly influenced later sci-fi writers; the novel provided an alternative view to common stories of the era with human-robot relationship that mimicked Frankenstein-like storyline, which often ended with the downfall of their human creators.