In the spring of 1963, King was arrested for leading a series of massive non-violent protests against the segregated lunch counters and discriminatory hiring practices rampant in Birmingham, Alabama. While in jail, King received a letter from eight Alabama ministers. They agreed with his goals, but they thought that he should call off the demonstrations and obey the law.
King explained why he disagreed in his LETTER FROM A BIRMINGHAM JAIL. “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 kinds of laws: just laws… and unjust laws. One has not only have a legal but a moral responsibility to obey just laws,” King said, “but conversely, one has a moral responsibility to disobey unjust laws.”
How does one determine whether the law is just or unjust? A just law, King wrote, “squares with the moral law of the law of God. An unjust law… is out of harmony with the moral law.”
Then King quoted Saint Augustine: “An unjust law is no law at all.” He quoted Thomas Aquinas: “An unjust law is a human law not rooted in eternal or natural law.” From the time of Emperor Nero, who declared Christianity illegal, to the days of the American slave trade, from the civil rights struggle of the sixties to our current battles against abortion, euthanasia, cloning, and same-sex “marriage,” Christians have always maintained exactly what King maintained.