For all the novelty of their fight, Conor McGregor and Floyd Mayweather Jr. have relied on boxing’s most durable means of promotion. Through words and behavior, they have concocted a racial rivalry in a climate ripe for exploiting it. In press tours stops in Los Angeles and Toronto, McGregor said to Mayweather, “Dance for me, boy.” In a subsequent tour stop in Brooklyn, following criticism of those remarks, McGregor explained he couldn’t be racist because he was “half-black from the belly button down.” He then thrust his pelvis as a gesture “to all my beautiful black female fans.” Mayweather has since stated many people believe McGregor is racist and dedicated the fight to “all the blacks around the world.” In a country still wracked by the recent horror of Charlottesville, Virginia, Mayweather and McGregor will fight Saturday night in Las Vegas in perhaps the richest and most outlandish boxing match in recent history.