给你些资料好了 自己组装一下~
Popular music based on the folk style of the southern rural United States or on the music of cowboys in the American West. Also called country and western.
a simple style of folk music heard mostly in the southern United States; usually played on stringed instruments
One of the most popular forms of contemporary music is country music, which found its humble beginnings in the early 1920s when folk music was taken one step further. Those who claimed fame, (mostly from the Appalachians) for having introduced folk music to the nation were now in the first quarter of the twentieth century introducing a slightly more sophisticated styling of the ‘hillbilly’ sound already made popular.
http://www.***.com/history/country.html
这个解释应该是最全的 可惜我现在打不开这个页面 你试试把http://en.wikipedia.org/wiki/Country_music