 However, shapeshifting folklore is not limited to Europe, nor to the Middle Ages; for example, some of Earth's oldest literature, the Bronze Age Eastern Semitic Epic of Gilgamesh, and East Asia's Huli Jing (origin of this folklore is of unknown date, but eighteenth century at the latest), contain shapeshifters.The werewolf (lycanthropy) is neither the only nor the earliest form of folklorical therianthropy (shapeshifting from human to animal, or vice versa).A solid consensus of authors and curators today interpret pre-Columbian art as expressing a belief in therianthropic shapeshifting, often citing hallucinogenic drugs as the root of the Mesoamerican and Desert Southwest shapeshifter folktales.