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Natural Law and American Civil Rights Movements

It was on the foundation of St. Augustine’s natural law theory, then, that Martin Luther King, Jr. discovered the grounds of civil disobedience: “A just law is a man-made code that squares with the moral law or the law of God. An unjust law is a code that is out of Harmony with the moral law.” Nor did he stop there. He invoked Aquinas, Martin Buber, Socrates, Tillich, and Niebuhr (among other authorities) to establish that the claim he defended was not a parochial claim merely derived from majority rule. To defend civil rights for black people meant to prove that “segregation is not only politically, economically and sociologically unsound, it is morally wrong and sinful.”