An interesting article that plants a 40 year perspective on the iconic release at the height of the 60’s:
If Sgt. Pepper’s Lonely Hearts Club Band doesn’t have a concept, it does have a theme. It’s a record about England in the midst of whirling change, a humorous, sympathetic chronicle of an old culture convulsed by the shock of the new—by new music and new mores, by rising hemlines and lengthening hair and crumbling caste systems. In short, it’s a record about the transformations that the Beatles themselves, more than anyone else, were galvanizing.