The boundaries between pop, country and western, and rhythm and blues were
defined by geography and/or race in the minds of the music industry, with pop assumed
to be consumable by everybody. Country and western was for white people in the South
and the West, and rhythm and blues was for black audiences. Once it emerged, rock
and roll would not only prove these boundaries to be based on false premises but would
also throw another into the mix: age of the audience. With these ideas in mind, are there
boundaries in place between pop, country and western, and rhythm and blues today? If
so, are they rooted in geography, race, age, or something different?