" The pillars of traditional healing were 1) connection to clan and the natural world; 2) regulating rhythm through dance, drumming, and song; 3) a set of beliefs, values, and stories that brought meaning to even senseless, random trauma; and 4) on occasion, natural hallucinogens or other plant-derived substances used to facilitate healing with the guidance of a healer or elder. "

― Bruce D. Perry , What Happened To You?: Conversations on Trauma, Resilience, and Healing