Country and western, sometimes referred to as Country-Western or simply Country, is a popular music genre that originated in the Southern United States in the early 1920s. Synonyms for Country and Western include Hillbilly, Bluegrass, Americana, Folk, Western, Honky-Tonk and Countryfolk. These genres may vary in style and content but all share themes of love, heartbreak, and working-class life. Hillbilly and Bluegrass have their roots in traditional mountain music, while Honky-tonk emerged in the 1940s and 1950s as a more urban form of country music. Americana, Folk and Countryfolk have expanded the genre, incorporating elements of rock, pop, and blues. It's a diverse and evolving genre that continues to delight fans across the world.