Claude Levi-Strauss was a French anthropologist known for his work on structuralism and structural anthropology. He believed that language and thought are structured through binary oppositions, or contrasting terms like good and evil, light and dark. According to Levi-Strauss, these opposing concepts shape how we understand and perceive the world. Examples of binary oppositions in stories include heroes versus villains, as seen in Harry Potter with Harry/Voldemort and in Batman with Batman/Joker.