With crustier beats and crankier rhymes, Keep Right kicks the teeth out of last year’s Krystle. Evidently, KRS-One has been stewing since the summer of 2003, watching the rise of ever-phonier politicians and ever-schlockier commercial rappers; he uses that anger most productively on “You Gon Go?” Although the emcee’s raison d’’tre hasn’t changed since the ’80s-when “real hip-hop” bravado had more bite than it does today-he addresses current international politics with the appropriate degree of urgency. Even if KRS isn’t contributing anything new to hip-hop, he still retains his position as one of the genre’s standard-bearers with Keep Right.