Over 40 years ago, philosopher Robert Adams compared moral arguments for God’s existence to an abandoned farm. Then, the authors followed up with The Moral Argument (2019), a history of moral arguments across Western thought. The earlier books assume objective morality—that some things are right or wrong, good or evil, regardless of human opinion. Moral realism is the philosophical term for the view that objective morality exists. If moral realism is false, then our deepest moral convictions—about justice and kindness, oppression and cruelty—are just preferences.