John Mackie (philosopher)

John Mackie was an influential 20th-century Australian philosopher best known for his work in ethics and metaethics. He argued against the existence of objective moral values, claiming that moral statements are expressions of our feelings or attitudes rather than facts about the world. This view is known as moral anti-realism. In his notable work, "Ethics: Inventing Right and Wrong," Mackie famously introduced the "argument from queerness," suggesting that if moral values were objective, they would be strange and unlike anything else in nature. His ideas continue to prompt debate about the nature of morality and its foundations.