On this, their second full-length album, Million Dollar Marxists deliver a brand of fist-raising punk rock that somehow manages to be earnest and still not take itself too seriously. Blistering, unrelenting guitars? Check! Non-wimpy punk vocals you can sing along with? Check! An irrepressible urge to play this album as loud as your stereo will go? Check, again. Two of the album’s songs, “X Street” and “Praise the Mutilated World,” have already made it onto the playlist I listen to while running, which is not to say that this is nerdy exercise music. No, more like music that lights a fire under your ass and makes you want to dance. Or run.