"Sgt. Pepper hit a nerve in popular culture as nothing before had…. ‘For a brief while,’ critic Langdon Winner famously wrote, ‘the irreparably fragmented consciousness of the West was unified, at least in the minds of the young.’
This was seen — and is still remembered — as a call to community. In some ways, the Beatles had represented this ideal all along: Through them, we witnessed the cultural power that a pop group and its audience could create; with Sgt. Pepper, possibilities of all sorts that felt boundless. Rock & roll became collusive with the social and political disruptions of the 1960s."
Rolling Stone magazine,
The Beatles: The Ultimate Album-by-Album Guide