The Lumineers show how stripping down American folk music to its essence can result in captivating pop. The Denver-based band’s 2012 breakout single, “Ho Hey”, inspired listeners all around the world to stomp and holler along with them, and to forget about modern recording-studio technologies while reveling in the raggedly human energies of collective music-making. Tracks like “Ophelia” and “Gloria” pair tales borrowed from real life with rousing harmonies, intense strumming and handclap-led rhythms, giving old-school American folk an enthralling—and hooky—update.