Judge Roy Moore of Alabama is back in the news. A decade after he defied federal courts over displaying the Ten Commandments, he’s defying them over same-sex marriage. Steve Brooks uses Moore’s story to take a fresh look at the touchy subject of morality and its much-maligned opposite: moral relativism. He shows how relativism can be a source of human progress, and how the key moral question is not, “Who is my God?” but, “Who are my relatives?” Want to take the M-word back from the self-appointed self-righteous? Here’s a way to start.