Each country has their own folk music, but the genre usually refers to American and British music that has been passed through the generations by oral tradition. It's simple, acoustic-based music that spins everyday events and common people into mythic status. Many traditional folksongs have no known author, they have simply evolved over the years. Most of the earliest recorded folk music was of this nature, but with Woody Guthrie, topical folk began making its way to record. Still, many artists, including the Weavers and Pete Seeger, chose to mix traditional songs with newer material, either written by the artists themselves or other contemporary musicians. Initially, Bob Dylan functioned in that style, but by his second album, Freewheelin' Bob Dylan, he began relying entirely on original material, thereby ushering the modern era of folk, where most performers sang their own material, and only occasionally throwing in covers.