Are the Beatles the reason why modern music exists

I believe that the Beatles are the reason why modern music exists. The album that ushered in modern music was "Sgt. Pepper's Lonely Hearts Club Band". Although I consider it maybe their 4th best album, this is the one(One person said it was the Rolling Stones, but do you remember what their equivalent album was? It was called "Satanic Majik Mysteries", or some such{you had to be there}.) It definitely wasn't Elvis. Although good, Elvis was not the innovation that allowed modern music. One interesting thing is to ask youngsters what the Beatles' "White Album" is.
There's no doubting that in terms of cultural impact (which is a completely different issue) The Beatles were unique.

I love that Brian Eno story about how in the early 70's he had a conversation with a classical composer who told him "everything in rock music had already happened in classical music by 1832"
Eno said "That doesn't account for Elvis,though"
The composer replied "Well that wasn't a musical revolution but a social one"
The Sgt. Pepper album came out after George Harrison paid a visit to San Francisco. Think of them more like Pat Boone making hits out of Little Richard tunes. There was music coming out of LA and San Francisco that was much more interesting than the Beatles, at least until Mr. Martin started working with them. Just like today, however, Pop music sells more and has more influence than the music it copies.
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Chuck Berry, Jerry Lee Lewis, Elvis, Fats Domino and many others prior to the Beatles.