1951-1960 africains africanamericanmusicians africanamericans africanamericansinpopularculture africancontinentalancestrygroup africandiaspora africaninfluences africans america blackrace blacks civilisation civilization counterculture esclavage esclaves états-unis freedpersons general histoire history historyandcriticism influencenoireaméricaine intellectuallife music noirsaméricains popularculture popularmusic racerelations rockmusic slavery slaves socialconditions sociallifeandcustoms songs spain spanish unitedstates usarootsofrockandrollblackmusic western