Dr King on Natural Law
From the famous Letter from a Birmingham Jail (16 April 1963):
You express a great deal of anxiety over our willingness to break laws. This is certainly a legitimate concern. Since we so diligently urge people to obey the Supreme Court's decision of 1954 outlawing segregation in the public schools, it is rather strange and paradoxical to find us consciously breaking laws. One may well ask: "How can you advocate breaking some laws and obeying others?" The answer is found in the fact that there are two types of laws: There are just and there are unjust laws. I would agree with Saint Augustine that "An unjust law is no law at all."
Now, what is the difference between the two? How does one determine when a law is just or unjust? 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. To put it in the terms of Saint Thomas Aquinas, an unjust law is a human law that is not rooted in eternal and natural law. Any law that uplifts human personality is just. Any law that degrades human personality is unjust. All segregation statutes are unjust because segregation distorts the soul and damages the personality. It gives the segregator a false sense of superiority, and the segregated a false sense of inferiority. To use the words of Martin Buber, the Jewish philosopher, segregation substitutes and "I-it" relationship for an "I-thou" relationship, and ends up relegating persons to the status of things. So segregation is not only politically, economically and sociologically unsound, but it is morally wrong and sinful. Paul Tillich has said that sin is separation. Isn't segregation an existential expression of man's tragic separation, an expression of his awful estrangement, his terrible sinfulness? So I can urge men to disobey segregation ordinances because they are morally wrong.(Bold face added)
Dr King was an ordained minister. He lead the Southern Christian Leadership Conference. The biblical and theological bases of his crusade were never a secret. Nor were his theological goals a secret--he declared them openly to the world. Yet none of this made him a theocrat. His consistent message that the laws of the Southern man had to conform to the laws of God was not a call for theocracy but a call for justice.