Across West Africa up to the 19th century, titled positions for women ensured that women’s interests could be voiced and their disputes regulated. Women often had major roles as brokers and intermediaries in trade centers along the Saharan and Atlantic littorals, contributing to the emergence of powerful Euro-African families. Nevertheless, women were particularly vulnerable to the depredations of the trans-Saharan and Atlantic slave trades. Because female labor was so highly valued, female slaves were more expensive than male slaves. The history of women in West Africa has been characterized by marked differences by ecological zone. Those differences have been deepened by Islamic influences in the North and by different experiences under French, British, and Portuguese rule. With the decline in the Atlantic trade and the growing emphasis upon commodity production, the demand for female labor in agriculture and in processing rose. Under colonial rule, the loss of slave labor was partially offset by increasing demands upon the labor of wives. Women mediated demands upon their labor through colonial courts, with some success in the early decades of the 20th century. Later courts and administrators supported patriarchal controls upon women in the interests of order and a smoothly running economy. Women’s control over their traditional means of accumulating wealth through farming, cloth production, and specialized crafts was typically undermined as economies shifted to emphasize cash crop production and tree crops in particular. Women nevertheless could flourish in market trade and could sometimes gain control over new niches in the economy. The growth of colonial infrastructure had contradictory implications. Women’s traditionally important roles as queens, priestesses, and ritual specialists declined in importance. At the same time, schooling gave some women access to new means of gaining income and prestige as teachers and medical practitioners.