The Grateful Dead were an American rock band formed in 1965 in Palo Alto, California, known for their eclectic style that fused elements of rock, blues, jazz, folk, country, bluegrass, rock and roll, gospel, reggae, and world music with psychedelia. The band is famous for improvisation during their live performances, and attracted a devoted fan base, known as "Deadheads." According to the musician and writer Lenny Kaye, the music of the Grateful Dead "touches on ground that most other groups don't even know exists." For the range of their influences and the structure of their live performances, the Grateful Dead are considered "the pioneering godfathers of the jam band world".