An integral part of the American folk music revival, the Clancy Brothers helped popularize Irish traditional music in the United States in the 1950s and '60s. Known for their signature Aran sweaters and vibrant arrangements of sea shanties, protest and drinking songs, and old Irish ballads, the group influenced a whole generation of folk artists, including Bob Dylan, Paul Brady, and Christy Moore, and helped to pave the way for like-minded acts such as the Dubliners and the Wolfe Tones. Initially comprised of siblings Patrick, Tom, and Liam Clancy, and artist, poet, storytelle...