Billy the Kid as Trickster

"...he always breaks in, just as the unconscious does, to rip up the rational situation. He's both a fool and someone who is beyond the system. And the trickster hero represents all those possibilities of life that the mind hasn't decided it wants to deal with. The mind structures a lifestyle, and the fool or trickster represents another whole range of possibilities. He doesn't respect the values you've set up for yourself, and smashes them."

-Joseph Campbell, AN OPEN LIFE