Vernon Dalhart was the first country singer to have a nationwide hit in May 1924 with "Wreck of the Old 97". The flip side of the record was "Lonesome Road Blues", which also became very popular. In April 1924, "Aunt" Samantha Bumgarner and Eva Davis became the first female musicians to record and release country songs. Many "hillbilly" musicians, such as Cliff Carlisle, recorded blues songs throughout the decade and into the 1930s. Other important early recording artists were Riley Puckett, Don Richardson, Fiddlin' John Carson, Uncle Dave Macon, Al Hopkins, Ernest V. Stoneman, Blind Alfred Reed, Charlie Poole and the North Carolina Ramblers and The Skillet Lickers. The steel guitar entered country music as early as 1922, when Jimmie Tarlton met famed Hawaiian guitarist Frank Ferera on the West Coast.
The American and British counterculture explosion and hippie movement had diverted music to that which was dominated by socially and American politically incisive lyrics by the late 1960s. The music was an attempt to reflect upon the events of the time – civil rights, the war in Vietnam and the rise of feminism. This led to the Canadian government passing Canadian content legislation to help Canadian artists. On January 18, 1971 regulations came into force requiring AM radio stations to devote 30 per cent of their musical selections to Canadian content. Although this was (and still is) controversial, it quite clearly contributed to the development of a nascent Canadian pop star system.
In the 2010s, "bro-country", a genre noted primarily for its themes on drinking and partying, girls, and pickup trucks became particularly popular. Notable artists associated with this genre are Luke Bryan, Jason Aldean, Blake Shelton, and Florida Georgia Line whose song "Cruise" became the best-selling country song of all time. Research in the mid-2010s suggested that about 45 percent of country's best-selling songs could be considered bro-country, with the top two artists being Luke Bryan and Florida Georgia Line. Albums by bro-country singers also sold very well—in 2013, Luke Bryan's Crash My Party was the third best-selling of all albums in the US, with Florida Georgia Line's Here's to the Good Times at sixth, and Blake Shelton's Based on a True Story at ninth. It is also thought that the popularity of bro-country helped country music to surpass classic rock as the most popular genre in America in 2012. The genre however is controversial as it has been criticized by other country musicians and commentators over its themes and depiction of women, opening up a divide between the older generation of country singers and the younger bro country singers that was described as "civil war" by musicians, critics, and journalists." In 2014, Maddie & Tae's "Girl in a Country Song", addressing many of the controversial bro-country themes, peaked at number one on the Billboard Country Airplay chart.
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