As an American I may be biased, but I'm gonna say the USA. We invented Blues which would eventually spawn Rock n' Roll. We also made Jazz of course.

That's not to say the UK didn't make great music. Many of my favorite artists are British.

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USA. Greatest band in history is from here.

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1984 Squier Contemporary Stratocaster
1986 Peavey Envoy 110
1967 Kingston Acoustic

And that would be...

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1984 Squier Contemporary Stratocaster
1986 Peavey Envoy 110
1967 Kingston Acoustic

Has to be USA....

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Both, and neither.

Without the influence that African folk music had on American folk music there would be no such thing as blues (which is arguably a uniquely American art form). If there's no such thing as blues, then there's no such thing as jazz, country, and rock. And those styles of music had great influence on everything from rap to pop to basically anything you hear that's not classical music today. Of course, I think that rock music would've sounded much different and maybe not have been as popular without a British influence. So it's really hard to say, I think to decide that question you would have to look at individual bands and make that judgment based on that band's influences.

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Neither. Germans.

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Rated "M" for meaty.

Peter Green

Crock the caveman.

For Rock, Chuck Berry influenced the brits.

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Gary

I'd have to say the UK
The Yardbirds
Clapton
Led Zeppelin
Black Sabbath
The Beatles
Judas Priest
The Who
Pink Floyd

Not taking anything from the Rock n Roll Pioneers in the USA
Little Richard
Elvis
Jerry Lee Lewis

But without the Brits, "rock" would not be where it is today.

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"Life is like eating jalapenos. What you do today may burn your arse tomorrow"

Robert Johnson
Albert King
Chuck Berry
Buddy Holly
Bob Dylan
Jimi Hendrix
Steve Vai
Stanley Jordan
Ray Charles
Stevie Wonder
Dick Dale
The Beach Boys
Van Halen

Yep I bet we could each go on and on



Lets see, now who were their influences?

Influences
The Beatles' earliest influences include Elvis Presley, Carl Perkins, Little Richard and Chuck Berry.[299] During their co-residency with Little Richard at the Star-Club in Hamburg, from April to May 1962, he advised them on the proper technique for performing his songs.[300] Of Presley, Lennon said, "Nothing really affected me until I heard Elvis. If there hadn't been Elvis, there would not have been the Beatles."[301]
Other early influences include Buddy Holly, Eddie Cochran, Roy Orbison[302] and the Everly Brothers.[303] The Beatles continued to absorb influences long after their initial success, often finding new musical and lyrical avenues by listening to their contemporaries, including Bob Dylan, Frank Zappa, The Lovin' Spoonful, The Byrds and The Beach Boys, whose 1966 album Pet Sounds amazed and inspired McCartney.[304][305][306] Martin stated, "Without Pet Sounds, Sgt. Pepper wouldn't have happened ... Pepper was an attempt to equal Pet Sounds".[307] Ravi Shankar, with whom Harrison studied for six weeks in India in late 1966, had a significant effect on his musical development during the band's later years.[308]

http://en.wikipedia.org/wiki/The_Beatles#Influences

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Country folks down south had a large amount of songs that originated in Scotland, Ireland, and England. This is mountain music for one. Old hymns originated over there, too. So these morphed into country music and R&R along with old styles that started the blues in the 20s I believe. Of course, African music. R&B, blues, country, gospel = R&R.

You can't have one without the other Kyle. Lets call it a tie

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you can save the world with your guitar one love song at a time it's just better, more fun, easier with a fender solid body electric guitar or electric bass guitar.

Americans for inventing blues which spawned jazz, country, rockabilly and rock 'n roll.

Brits for morphing rock 'n roll into rock, (Beatles/British invasion) inventing the supergroup, inventing metal, punk and perfecting the rock concert.

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Just think of how awesome a guitar player you could have been by now if you had only spent the last 10 years practicing instead of obsessing over pickups and roasted maple necks.