Masquerades form an important part of indigenous African religions, and headpieces of masks are found all over the world as an iconic African art form. Contrary to expectation, however, the... Show moreMasquerades form an important part of indigenous African religions, and headpieces of masks are found all over the world as an iconic African art form. Contrary to expectation, however, the geographical distribution of masking is very restricted, occurring only in three areas of the continent, mainly situated in the forested zones. I explain this peculiar distribution by tracing the ecological and historical parameters of the societies that harbor mask rituals. The main ecological factors are the absence of cattle and the type of horticulture, while a crucial historical element is the long history of slave raiding and trading to which the continent has been subjected. These factors have led to societies in which both gender and local power arrangements show a marked indeterminacy, operating as internal arenas between men and women, and between different groups of men. Crucial in the explanation of masquerades is the fact that masking is completely absent from societies that practice cattle husbandry with the Bos indicus species (zebu). Since sleeping sickness prohibits cattle husbandry, wherever the tsetse fly thrives, masks appear. Show less