No one has ever maximized the minimal the way that Jack and Meg did on this monster, which proves that the only limitation on a two-man band is imagination. It opens with a classic anthem (“Seven Nation Army”), touches on gentle acoustic pop (“You’ve Got Her in Your Pocket”), sizzles with slow-burn blues (“Ball and Biscuit”) and rages through some howling proto-garage rock (“Girl You Have No Faith in Medicine”) that few other bands could hope to touch. This isn’t just an Elephant; it’s a Mammoth.