The modern jam-band scene would be nothing without The Grateful Dead. With their gift for cooking country, blues, folk, and rock into a psychedelic stew, the hippie icons' influence runs deep in their protégés Phish and fellow tie-dyed road warriors like Widespread Panic, as well as crossover stars like The Dave Matthews Band. Even indie artists like Wilco, Animal Collective, and The National owe them a debt for their influence.