Rock and roll has usually been seen as a combination of rhythm and blues and country music, a fusion particularly evident in 1950s rockabilly. There has also been cross-pollination throughout the history of both genres; however, the term “country-rock” is used generally to refer to the wave of rock musicians of the late 1960s and early 1970s who began recording rock songs with country themes, vocal styles, and additional instrumentation, most characteristically pedal steel guitars. John Einarson states, that "[f]rom a variety of perspectives and motivations, these musicians either played rock & roll attitude, or added a country feel to rock, or folk, or bluegrass, there was no formula".
The third generation (1950s–1960s) started at the end of World War II with "mountaineer" string band music known as bluegrass, which emerged when Bill Monroe, along with Lester Flatt and Earl Scruggs were introduced by Roy Acuff at the Grand Ole Opry. Gospel music remained a popular component of country music. Another type of stripped-down and raw music with a variety of moods and a basic ensemble of guitar, bass, dobro or steel guitar (and later drums) became popular, especially among poor whites in Texas and Oklahoma. It became known as honky tonk, and had its roots in Western swing and the ranchera music of Mexico and the border states. By the early 1950s a blend of Western swing, country boogie, and honky tonk was played by most country bands. Rockabilly was most popular with country fans in the 1950s, and 1956 could be called the year of rockabilly in country music, with Johnny Cash emerging as one of the most popular and enduring representatives of the rockabilly genre; rockabilly was also a starting point for eventual rock-and-roll superstar Elvis Presley, who would return to his country roots near the end of his life. Beginning in the mid-1950s, and reaching its peak during the early 1960s, the Nashville sound turned country music into a multimillion-dollar industry centered in Nashville, Tennessee; Patsy Cline and Jim Reeves were two of the most broadly popular Nashville sound artists, and their deaths in separate plane crashes in the early 1960s were a factor in the genre's decline. The late 1960s in American music produced a unique blend as a result of traditionalist backlash within separate genres. In the aftermath of the British Invasion, many desired a return to the "old values" of rock n' roll. At the same time there was a lack of enthusiasm in the country sector for Nashville-produced music. What resulted was a crossbred genre known as country rock.
Diana Krall, Gino Vannelli, Martha & The Muffins, Buffy Sainte Marie, Stompin’ Tom Connors, Ian & Sylvia, Stan Rogers, Bare Naked Ladies, K-OS, The Weeknd, Metric, Sloan, Crash Test Dummies, Kim Mitchell / Max Webster, Tegan and Sarah, Alanis Morrisette, Jeff Healy, The New Pornographers, Cowboy Junkies, The Constantines, The Rheostatics, Cory Hart, April Wine, Grimes, 54-40, Shania Twain & Celine Dion.
Following his Rodney Crowell/John Leventhal-produced Planet of Love – which yielded cuts for George Strait, Lee Ann Womack, Patty Loveless, Mandy Barnett and George Jones, the North Carolina-born Lauderdale seemed more in control of his progressive California-forged traditional country. With songs that were existential (“When The Devil Starts Crying,” “Three Way Conversation” “Run Like You”), Lauderdale—like Gram Parsons before him—created a Cosmic American hybrid that blurred bluegrass, Haggard, Jones, Lefty Frizzell and Ray Price with ethereal metaphors for a new kind of classicism. Producer Dusty Wakeman drew on Lauderdale’s scrappy Palomino Club band—Buddy Miller on guitars and vocals, Dr John Ciambotti on bass, Donald Lindley on drums, Greg Leisz on dobro, electric and steel guitar, Gurf Morlix on 6-string bass, mandolin, electric/acoustic/12-string/steel guitars, Skip Edwards on organ and Tammy Rodgers on mandolin and vocals—to return Truth to the lean sound Lauderdale’d developed playing South California’s post-cowpunk outposts. That the band members would become Americana forces in their own right speaks to the scene around the man who coined the phrase, “Now that’s Americana!”—Holly Gleason
These early styles had coalesced into a genre by the time the Illinois group Uncle Tupelo released their influential debut album No Depression in 1990. The album is widely credited as being the first "alternative country" album, and inspired the name of No Depression magazine, which exclusively covered the new genre. Following Uncle Tupelo's disbanding in 1994, its members formed two significant bands in genre: Wilco and Son Volt. Although Wilco's sound had moved away from country and towards indie rock by the time they released their critically acclaimed album Yankee Hotel Foxtrot in 2002, they have continued to be an influence on later alt-country artists.