On the surface, the definition of country rock should be relatively simple. When people think of country rock music and country rock songs, they imagine country singers making the dreaded switch to play rock music. However, many of the best country bands made the switch from rock to play country-infused rock songs, thus the name of country rock. Bands would record using a pedal steel, sing about themes commonly associated with country and by the beginning of the 1970s, country rock became a genre that became popular in the mainstream.
Derived from the traditional Western and honky tonk musical styles of the late 1950s and 1960s, including Ray Price (whose band, the "Cherokee Cowboys", included Willie Nelson and Roger Miller) and mixed with the anger of an alienated subculture of the nation during the period, outlaw country revolutionized the genre of country music. "After I left Nashville (the early 70s), I wanted to relax and play the music that I wanted to play, and just stay around Texas, maybe Oklahoma. Waylon and I had that outlaw image going, and when it caught on at colleges and we started selling records, we were O.K. The whole outlaw thing, it had nothing to do with the music, it was something that got written in an article, and the young people said, 'Well, that's pretty cool.' And started listening." (Willie Nelson) The term outlaw country is traditionally associated with Willie Nelson, Jerry Jeff Walker, Hank Williams, Jr., Merle Haggard, Waylon Jennings, Joe Ely, Steve Young, David Allan Coe, John Prine, Billy Joe Shaver, Gary Stewart, Townes Van Zandt, Kris Kristofferson, Michael Martin Murphey, Tompall Glaser, Steve Earle, and the later career renaissance of Johnny Cash, with a few female vocalists such as Jessi Colter, Sammi Smith, Tanya Tucker and Rosanne Cash. It was encapsulated in the 1976 album Wanted! The Outlaws.
Beginning in 1989, a confluence of events brought an unprecedented commercial boom to country music. The arrival of exceptionally talented artists coincided with new marketing strategies to engage fans, technology that more accurately tracked the popularity of country music, and a political and economic climate that focused attention on the genre. Garth Brooks ("Friends in Low Places") in particular attracted fans with his fusion of neotraditionalist country and stadium rock. Other artists such as Brooks and Dunn ("Boot Scootin' Boogie") also combined conventional country with slick, rock elements, while Lorrie Morgan, Mary Chapin Carpenter, and Kathy Mattea updated neotraditionalist styles.
By the end of World War II, "mountaineer" string band music known as bluegrass had emerged when Bill Monroe joined with Lester Flatt and Earl Scruggs, introduced by Roy Acuff at the Grand Ole Opry. That was the ordination of bluegrass music and how Bill Monroe became to be known as the "Father of Country Music." Gospel music, too, remained a popular component of bluegrass and other sorts of country music. Red Foley, the biggest country star following World War II, had one of the first million-selling gospel hits ("Peace in the Valley") and also sang boogie, blues and rockabilly. In the post-war period, country music was called "folk" in the trades, and "hillbilly" within the industry. In 1944, The Billboard replaced the term "hillbilly" with "folk songs and blues," and switched to "country" or "country and Western" in 1949. https://www.youtube.com/watch?v=hyNAvdnZ5Ec