Popularizers of the frenetic D-beat drumming style, Discharge inspired not only the hardcore and thrash bands that followed but dozens of homage acts starting with “Dis.” This is the album that did it. Kinda like an even faster Motorhead without any of that band’s characteristic subtlety, these English anarchists didn’t have much in the way of variety but made the most of each two-minute burst, slamming their political messages into the listener’s face over and over again. It still feels just as vital 40 years on. Different assholes, same problems.