Foxtrot is the band's fourth studio album, released in 1972. Regarded as one of the seminal albums of the progressive rock genre, it marked a significant milestone in Genesis' discography. AllMusic's Stephen Thomas Erlewine says Foxtrot is where where Genesis began to pull all of its varied inspirations into a cohesive sound. The startling thing about the opening "Watcher of the Skies" is that it's the first time that Genesis attacked like a rock band, playing with a visceral power, he writes, giving the album a 5-star review. "There's might and majesty here, and it, along with 'Get 'Em Out by Friday,' is the truest sign that Genesis has grown muscle without abandoning the whimsy. Certainly, they've rarely sounded as fantastical or odd as they do on the epic 22-minute closer "Supper's Ready," a nearly side-long suite that remains one of the group's signature moments. It ebbs, flows, teases, and taunts, see-sawing between coiled instrumental attacks and delicate pastoral fairy tales. If Peter Gabriel remained a rather inscrutable lyricist, his gift for imagery is abundant, as there are passages throughout the album that are hauntingly evocative in their precious prose." — AllMusic