John Michael Greer  is an American author who writes on ecology, religion, philosophy, politics, appropriate technology, oil depletion and the occult. He served from December 2003 to December 2015 as the Grand Archdruid of the Ancient Order of Druids in America, and since then has headed the Druidical Order of the Golden Dawn, which he founded in 2013. An initiate in Freemasonry, the Hermetic Order of the Golden Dawn, and the Order of Bards, Ovates and Druids.