Mark Johnson is an American philosopher known for his work in the fields of philosophy of language, cognitive science, and the philosophy of mind. He is particularly recognized for his contributions to the understanding of metaphor and its role in human thought and communication. His influential book, Metaphors We Live By, co-authored with George Lakoff, explores how metaphors shape our understanding of the world. Johnson's research emphasizes the importance of embodied experience in shaping our concepts and reasoning. He argues that our physical interactions with the world influence our cognitive processes, which has implications for various disciplines, including linguistics, psychology, and artificial intelligence.