By the time Tougher Than Leather hit the streets, Run-DMC was losing momentum, though "Christmas in Hollis" is still the only decent holiday rap. But in hindsight, that loss of momentum seems moot because these four pristine-sounding reissues make clear the breadth of Run-DMC's influence. Indeed, the genre's current crop, though immensely popular, has neither the trio's wit nor, dare I say, humility. Public Enemy (whose Flavor Flav writes liner notes), Eminem, Korn and even folks like Tool and a host of metal/rap poseurs owe a great debt to Joseph Simmons, Darryl McDaniels and Jason Mizell. The artists in Run-DMC were true originals, and the genre they helped create is in desperate need of an infusion of their brand of originality. Maybe these reissues, complete with bonus cuts that are actual bonuses, are a start.