Here's why:
* Folk Influences: Cash's music drew heavily on traditional folk music, especially in his early career. He often performed ballads, protest songs, and gospel tunes, which were staples of folk music.
* Rockabilly Roots: Cash was a pioneer of rockabilly, a genre that fused country music with rhythm and blues. This fusion brought a raw, energetic sound to country music, and it paved the way for rock-and-roll.
* Crossover Appeal: Cash's music transcended genres, appealing to both country and rock audiences. He was one of the first country artists to achieve mainstream success with rock-and-roll influences.
* Social Commentary: Cash's lyrics often tackled social issues like poverty, injustice, and war, which resonated with the rebellious spirit of rock-and-roll.
Other country singers who contributed to the folk tradition in rock-and-roll include:
* Carl Perkins (creator of "Blue Suede Shoes")
* Roy Orbison (known for his dramatic vocals and ballads)
* Elvis Presley (who blended country, gospel, and rhythm and blues)
These artists helped bridge the gap between country and rock, creating a new sound that would shape the future of popular music.