Given the paragraph about the Grateful Dead, tell me when they were founded, who were the original members, and what other members were in the group.

The Grateful Dead were founded in the 1960's as the Warlocks by Jerry Garcia, Bob Weir, Ron "Pigpen" McKernan, Phil Lesh and Bill Kreutzmann. Over the years, the band had many other members, including Tom Constanten, John Perry Barlow, Keith Godchaux, Donna Godchaux, Brent Mydland, Vince Welnick and Bruce Hornsby.