en.wikipedia.org/wiki/Country_music
Country music is a blend of popular musical forms originally found in the Southern United States and the Appalachian Mountains. It has roots in traditional folk music, Celtic music, blues, gospel music, hokum, and old-time music and evolved rapidly in the 1920s. The term country music began to be used in the 1940s when the earlier term hillbilly music was deemed to be degrading, and the term was widely embraced in the 1970s, while country and western has declined in use since that time, except in the United Kingdom and Ireland, where it is still commonly used.
Immigrants to the Southern Appalachian Mountains of North America brought the music and instruments of the Old World along with them for nearly 300 years. The Irish fiddle, the German derived dulcimer, the Italian mandolin, the Spanish guitar, and the African banjo were the most common musical instruments. The interactions among musicians from different ethnic groups produced music unique to this region of North America. Appalachian string bands of the early twentieth century primarliy consisted of the fiddle, guitar, and banjo. This early country music along with early recorded country music is often referred to as Old-time music.
Throughout the nineteenth century, several immigrant groups from Europe, most notably from Ireland, The United Kingdom, Germany, Spain, and Italy moved to Texas. These groups interacted with the Spanish, Mexican, Native American, and U.S. communities that were already established in Texas. As a result of this cohabitation and extended contact, Texas has developed unique cultural traits that are rooted in the culture of all of its founding communities. The settlers from the areas now known as Germany and the Czech Republic established large dance halls in Texas where farmers and townspeople from neighboring communities could gather, dance, and spend a night enjoying each other’s company. The music at these halls, brought from Europe, included the waltz and the polka, played on an accordion, an instrument invented in Italy, which was loud enough to fill the entire dance hall.
While album sales of most musical genres have declined, country music experienced one of its best years in 2006, when, during the first six months of the year, U.S. sales of country albums increased by 17.7 percent to 36 million. Moreover, country music listening nationwide has remained steady for almost a decade, reaching 77.3 million adults every week according to the radio-ratings agency Arbitron Inc.
The term "country music" is used to describe many styles, genres, or subgenres.
(Wikipedia)