A question about rock and roll?

Rock and roll is a form of music so would it be considered an invention or would it be considered to be a "development" or "movement" in musical history?|||i say movement because back in the 60s people wanted more diversity in what they were listening, so they created rock and roll!!!|||A genre.|||I'd say a development or a movement because it happened over time and was an adaptation of other styles, and because it's not a physical thing. But by definition it could be called an invention too.|||It was BOTH a development AND a movement. When I first started playing the piano, it was 1946 and the music was all the melodic, story telling music of the War times... By the time I took up the guitar and started my first band, the music had developed into a faster, rhythm based music with a 'dance' beat.. but it was still simple and told stories..





In the 1950's Rock and Roll and Folk Music were BOTH Movements... and sometimes the same musicians played both genres.





Music has ALWAYS been a DEVELOPMENT.. from 40,000 years ago when a caveman blew into the hollow tibia of an animal leg all the way to that abomination called "Hip-Hop" or (C)RAP.|||yes, it developed from rhythm and blues.