Bernard Arthur Owen Williams, commonly referred to as B.A.O. Williams, was a British philosopher known for his contributions to moral philosophy, political philosophy, and the philosophy of language. Some of the synonyms that are often used to describe him include an analytical philosopher, a neo-Aristotelian philosopher, and a one-time president of the Aristotelian Society. Additionally, he is also known for his work on the concept of morality and the intersection between politics and ethics. Despite his complex and often abstract ideas, his work has had a profound impact on contemporary thought, and his ideas continue to be studied and discussed by philosophers around the world.