Letters to the Editor
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Career Evolution
I agree that Sgt. Pepper's was more a technological achievement than a cultural one.
What is interesting about the Beatles is that they had several distinct phases in their career--they evolved. So sure, there were always bands that could go head-to-head with the Beatles in any one of their phases (Stones, Kinks, Small Faces, to name a few)--but none of those bands developed as much as the Beatles did.

