Line dancing has its roots in folk dances that European immigrants brought to North America in the 1800s. These dances, like the polka and waltz, merged and developed into round and square dancing. Cowboys on the western frontier in the late 1800s incorporated these dance moves into early country-western style. In the early 1900s, folk dancing was taught in schools, popularizing country-western dance among youth. Others believe line dancing emerged from the disco era of the 1970s, made popular by movies like Saturday Night Fever and Urban Cowboy that blurred pop and country music genres and inspired a new wave of western fashion and dance. Line dancing grew further in the early 1990s with country music's rising mainstream popularity