Kacey Musgraves bends country tradition to her will, writing songs that evoke the sound of classic country but are infused with progressive ideas reflecting her millennial perspective. "Merry Go Round" and "Follow Your Arrow," the big singles from her 2013 major-label debut, Same Trailer Different Park, crystallized this gift and established Musgraves as a major voice in country music who could cross over to a rock audience without playing pop. By the end of the decade, she expanded her musical horizons so they mirrored her expansive lyrical stance, a shift showcased on the cr...