Though sometimes tagged as an outsider, country singer Kacey Musgraves is more like a double agent: A country artist who can tackle progressive issues without losing her rootsy appeal. Even as Musgraves’ style evolved—from the pert, folksy miniatures of her early work to the polished ’70s singer-songwriter moves of 2018’s Golden Hour (which won a Grammy for Album of the Year)—Musgraves seemed both of the industry and outside it, quietly stretching not just how we define modern country, but who gets to do the defining in the first place.