Atlantic trade also influenced the physiological aspects of Gorean society. Archaeology has uncovered a plethora of evidence for massive imports of alcoholic beverages on the island. The massive import of alcoholic beverages naturally suggests a high level of consumption which its effects have been recorded as drunken conflicts, commonly between the military inhabitants. The previously mentioned Dr Ibrahima Thiaw is also the author of "Digging on Contested Grounds: Archaeology and the Commemoration of Slavery on Gorée Island". In this article, Thiaw discusses the difference between the historical accounts full of slavery and shackles and the lack of archaeological evidence to support those accounts. Raina Croff, one of Thiaw's colleagues, states that she personally has never found any evidence of slavery on Gorée Island, however she also includes that archaeological evidence such as shackles and chains would not be found on an island, because there is no need.