Temple Grandin
Grandin worked most of her life to help the cruel living conditions of livestock. She worked on ways to prevent putting stress on animals before slaughter (when they are killed to be used for meat). Considering Grandin was autistic, she noticed the similarities in the way animals and autistic people saw the world, which let her help the cause even more. She's been a professor for over 20 years. She has taught animal science at Colorado State University since 1990.