Transatlantic Slavery and the Shift to Peanuts

Transatlantic Slavery and the Shift to Peanuts

Peanut agriculture, transatlantic slavery, and the ivory trade are interconnected through the shift from human trafficking to "legitimate commerce" in 19th-century West Africa.

​1. Transatlantic Slavery and the Shift to Peanuts

​When European powers—particularly France and Britain—banned the transatlantic slave trade in the early to mid-19th century, European merchants transitioned to trading West African commodities. In France, industrialization created an enormous demand for vegetable oils to produce soaps (such as Savon de Marseille), cosmetics, and machine lubricants.

​Peanuts (Arachis hypogaea) became the ideal cash crop to fulfill this demand. However, the rise of peanut farming did not end African slavery; instead, it transformed and prolonged domestic slavery within West Africa:

• ​Domestic Slave Labor: To clear large swathes of dry forests and harvest peanuts, local West African elites, rulers, and merchants heavily relied on enslaved labor (captifs).

• ​Perpetuation of Slavery: Because European demand for peanut oil grew exponentially, indigenous demand for enslaved workers to cultivate the crop increased, keeping internal slave markets active long after Atlantic shipments ceased.

​2. The Ivory Trade Connection

​The ivory trade functioned alongside the early cash-crop and slave economies as an extractive, high-value trade:

• ​Porterage and Slave Labor: Ivory required heavy manual transport from interior hunting grounds to coastal ports. Enslaved people were frequently used both as porters to carry ivory tusks and as an interchangeable currency alongside ivory.
• ​Economic Pivot: As elephant populations were depleted by hunting and European powers turned toward large-scale industrial manufacturing, raw agricultural materials like peanuts replaced ivory and wild extraction as the dominant economic engine of colonial West Africa.

​3. Peanuts as the Primary Cash Crop in Senegal

​Under French colonial rule, Senegal was converted into a monoculture export economy centered on peanuts:

• ​French Industrial Monopoly: Major French trading houses (e.g., Maurel & Prom, Devès & Chaumet, CFAO) established monopolies over purchasing, credit, and export. They pushed the colonial administration to expand into interior kingdoms like Cayor and Sine-Saloum to open up land for groundnuts.

• ​Religious Brotherhoods: Islamic brotherhoods—most notably the Mouride Order—organized rural disciples (talibés) into agricultural communes (daaras). Disciples cleared vast tracts of interior savanna in the Peanut Basin (Bassin Arachidier) to farm peanuts, creating substantial agricultural capital.

• ​Ecological Exhaustion: Because harvesting peanuts requires uprooting the entire plant, decades of monoculture stripped organic nitrogen and phosphorus from the soil. Combined with the widespread clearing of native trees like Faidherbia albida, this practice caused severe soil acidification, compaction, and desertification.

​Other Cash Crops Used by Europeans in Senegal

​Before and alongside the dominant peanut monoculture, European traders and colonial authorities exploited several other primary cash commodities in Senegal:

• ​Gum Arabic (Gomme Arabique): Before the rise of the peanut, gum arabic (harvested from Acacia trees in northern Senegal and southern Mauritania) was Senegal’s most critical commodity export. Used in Europe for textile dyeing, printing, paper manufacturing, pharmaceuticals, and adhesives, it dominated French trade along the Senegal River through the mid-19th century.
• ​Cotton: The French colonial administration repeatedly attempted to establish cotton plantation schemes (particularly along the Senegal River Valley) to supply textile mills in France, though yields were often erratic compared to peanuts.
• ​Palm Products: Though palm oil and palm kernels were produced in much higher volumes further south in coastal West Africa, Senegal served as an early regional hub for trading palm products used for industrial lubricants and soap manufacturing.

• ​Hides and Leather: Raw animal hides from cattle, sheep, and goats were systematically purchased by European trading firms from pastoral communities in northern and central Senegal for export to European leather tanneries.
• ​Sugarcane and Garden Produce: Late colonial and early post-independence projects introduced irrigated sugarcane and commercial horticulture (such as tomatoes and onions along the Niayes coastal belt) to diversify export and local agricultural revenues.