This program travels to both developing and industrialized countries to capture culture-defining rhythms and melodies and explain the important roles they play in human society. With stops in Africa, Asia, Latin America, the Caribbean, and Europe, the video observes how music is used by gauchos and Cossacks, Sufis and Buddhist monks, Papuan warriors and Western soldiers, Senufo weavers and flamenco dancers, marching protesters and singing soccer fans, and many others. Harmony and polyphony, music as an organizing principle, the spiritual qualities of sound, and how the brain processes music are touched upon as well. (52 minutes)