The Vodka-Hashish Dividing Line

“Some scholars have argued that Central Asian steppe nomads were almost destined to convert to Islam because of their religious tradition and their location relative to the “vodka-hashish” dividing line. In the forest zones of Russia, where vodka was consumed, Christianity prevailed. The steppe nomads who used hashish inclined to Islam.” ~ Kenneth Harl in his history lecture Era of the Crusades.