Contemporary folk music, or now more commonly just known as folk music, refers to the revival of folk music that occurred in the 20th century when new, more popular forms appeared that had links to traditional folk music. During the genre’s formative years of 1930s-1950s artists such as Woody Guthrie set a precedent for the genre by singing traditional and original songs, as well as displaying firm political views. Guthrie could often be identified by the phrase ‘This Machine Kills Fascists’ which was displayed on his guitar. Other artists such as Burl Ives commercialised and popularised folk music in this period. In 1958 the Kingston Trio achieved notable success with their song Tom Dooley, indicating the beginning of the era of popular folk music. Moving into the 60s, one of the main social issues was that of civil rights and the Vietnam War.