Pure Reason Revolution are one of the most distinctive voices in modern British progressive rock — a band who wrapped the scope and ambition of prog in lush, soaring vocal harmonies and a bold streak of electronics. Built around the partnership of Jon Courtney and Chloë Alper, they arrived with one of the great modern prog debuts, took a divisive electronic detour, and returned years later renewed. Few bands of their era sound quite so gorgeous.

The short version

Formed in London in 2003, Pure Reason Revolution play lush, electronics-laced British modern prog — layered male-and-female vocal harmonies and sweeping arrangements that fuse classic prog and space rock with alternative rock and dance-music textures. Across five studio albums from “The Dark Third” (2006) to “Above Cirrus” (2022), built around Jon Courtney and Chloë Alper, they carved out a sound all their own. Theirs is some of the most beautiful music in modern prog.

London: harmonies and a thesis on genius

Pure Reason Revolution — often shortened to PRR — formed in 2003 while their members were studying at the University of Westminster in London, growing out of an earlier band around singer-guitarist Jon Courtney and singer-bassist Chloë Alper. The group even took its name from Courtney’s thesis on the nature of genius, by way of Kant. Their 2006 debut “The Dark Third”, released on Sony BMG, won widespread acclaim for its ambition and its trademark interweaving harmonies, and the band shared stages with the likes of Porcupine Tree on their way up.

Lush and electronics-laced

Pure Reason Revolution’s defining feature is their voices. Drawing on the close, polyphonic harmonies of the Beach Boys — with Chloë Alper’s vocals often likened to Kate Bush — they layer male and female voices into something lush and immersive. Around those harmonies they weave classic prog and space rock, the heft of alternative and grunge, and a strong thread of electronics and dance music, drawing on influences from Pink Floyd to the Smashing Pumpkins to the Chemical Brothers. Variously dubbed “Astral Folk” and “New Prog”, theirs is a sound that resists easy labels — rich, modern and unmistakably their own.

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From The Dark Third to Above Cirrus

Pure Reason Revolution’s albums chart a winding journey. Their debut “The Dark Third” (2006) remains a modern prog landmark, all soaring harmony and space-rock grandeur, before “Amor Vincit Omnia” (2009) and “Hammer and Anvil” (2010) took a bolder, more electronic and dance-driven turn that divided their audience. The band split in 2011, but reunited toward the end of the decade, returning in acclaimed form with “Eupnea” (2020) — a record whose title, meaning untroubled breathing, was inspired by the early days of Courtney’s newborn daughter. “Above Cirrus” (2022) continued their renaissance, and the band have remained active since.

Album by album

Five albums of lush, harmony-rich, electronics-laced prog. Tap any title for its guide.

The players

Pure Reason Revolution have always been built around Jon Courtney — singer, guitarist, keyboardist and the band’s creative force and chief songwriter — together with co-founder Chloë Alper, whose vocals and bass were central to their sound for much of their career, before she moved on to other projects. Their early line-up also featured guitarist Greg Jong, multi-instrumentalist Jim Dobson and drummer Andrew Courtney, Jon’s brother, with guitarist Jamie Willcox a long-serving presence across several eras. Whatever the line-up, it is the Courtney–Alper harmonies that defined the band.

Where to start

Begin with “The Dark Third” (2006), Pure Reason