In both Plato’s Crito and King’s “Letter from a Birmingham Jail,” the basis for judgment of good and bad conduct is a recurrent theme. The basis for judgment of good or bad conduct is enshrined in the law of any land. The reason why states enact laws is to provide legal guidelines for establishing what conduct is good and what is not. Both Plato and King were jailed because the government of the time thought they had broken the law of the land. It was for the judges to decide whether their conduct was appropriate or not, making this judgment an important issue in Plato and King’s writings at the time. Although their views were probably determined and influenced by the predicament of the day, they provide valuable facts about the basis for judging good and bad conduct even nowadays.