“Plants can't very well defend themselves by their behavior, so they resort to chemical warfare, and plants are saturated with toxins and irritants to deter creatures like us who want to eat them.”

Canadian cognitive psychologist and public intellectual

Steven Arthur Pinker is a Canadian cognitive psychologist, psycholinguist, popular science author, and public intellectual. He is known for his work on the mind, language, and human nature, and for presenting those subjects to a wide general audience. Pinker supports evolutionary psychology and the computational theory of mind. He is the Johnstone Family professor of psychology at Harvard University, and his writing often returns to questions about how people think, speak, and understand the world.