Spices and other goods were central to global trade networks dating back to the 7th century, when an Asian-centered economy emerged along with the spread of Islam. Trade routes between Islamic caliphates and Hindu merchants were integrated, allowing pre-existing political and business structures to continue. Various drugs like coffee, tea, cocoa, tobacco and sugar originated as trade goods and became widely popular internationally, though some were initially banned in consuming nations due to underground demand. Mesoamerican civilizations also engaged in long-distance trade of goods like silver, turquoise, bowls and blankets prior to European conquest disrupting these networks. Potatoes and sugar cane revolutionized European diets and economies through large-scale cultivation and distribution