People are wild if they are original and independent and not tamed and broken by society.

"Whatever has not come under the sway of man is wild.  In this sense original & independent people are wild - not tamed & broken by society."

Henry David Thoreau

Photo: The skeleton of a uniquely three-trunked tree is unveiled by a forest fire; Hewlett Burn, Poudre Canyon, CO; January 26, 2013