Elon Musk is an entrepreneur and engineer who leads electric car company Tesla, rocket company SpaceX, and neurotechnology startup Neuralink. He aims to accelerate sustainable energy production and humanity's expansion into space. Musk has helped make electric vehicles more mainstream through Tesla's affordable cars and Supercharger network, and advances rocket reusability through SpaceX. He advocates developing AI safely and sees people living on other planets as key to preserving life.