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Ruwa baya tsami a banza:

Water does not become bitter without cause.

There is a reason for everything.

The Sahel throughout history has been known for many things. To the historically inclined, it is the region that produced empires like Wagadu, Mali and Songhai, and cities of world renown like Timbuktu. Today, the Sahel represents something else entirely: instability, as it faces climate variability, insurgency, and fragile governance.

Stretching from Senegal in the west through Mali, Burkina Faso, Niger, northern Nigeria and onward to Chad and Sudan in the east, this 6,000 kilometre zone has produced more military coups in the last decade than anywhere else on earth. Since 2020 alone: Mali twice, Guinea, Burkina Faso twice, Niger, and Sudan, the latter embroiled in a devastating conflict between the Sudanese Armed Forces and the Rapid Support Forces that has already killed hundreds of thousands and displaced millions. The media dubbed it the coup belt. Security analysts called it the Sahel crisis. Outside powers, Russia, France, the Gulf states, the United States, manoeuvred for influence in a fracturing landscape.

What almost nobody asked, at least not with any seriousness, was the historical question: what was here before?

Not merely before the coups. Before the colonial borders that manufactured these states, before the French administrative systems that shaped their governments, before the extraction economies that defined their relationship to the world market.

What was the political and economic life of this zone when it was organised according to its own internal logic, by its own institutions, on the basis of its own material conditions? That is what I seek to explore through this platform.

This is not out of a sense of reactionary nostalgia. You cannot understand what a place has become without understanding what it was, what forces transformed it, and which of those transformations built capacity and which destroyed it. Northern Nigeria today is associated, in the global imagination and in too much of the Nigerian imagination, with poverty, insurgency and dysfunction.

Boko Haram. Bandits. The caricature of Sharia law deployed by politicians as a tool of control. Coups next door. Violence and weapons spilling across borders drawn by colonial administrators through the middle of communities, trade networks and political relationships that had existed for centuries before European powers decided they had the right to divide the continent at a conference table in Berlin.

These things did not come from nowhere. To understand where they came from, we have to look at the land itself, how it shaped the people, and how the people shaped it.

The Shore of the Great Sea of Sand

Sāhil in Arabic means coast or shore. In the imagination of the Arab geographers of the Middle Ages, the Sahara was not a wall. It was a sea. The camel earns its nickname, ship of the desert, honestly. It allowed merchants to make the months-long voyage across that vast expanse, linking the Mediterranean world to West Africa. The Sahel was the southern shoreline of that sea.

A shoreline is not a remote frontier. It is the first point of arrival. Goods land there, get taxed, get redistributed. The people who control the access points accumulate wealth and build institutions. The cities that grew along this shoreline, Timbuktu, Gao, Agadez, Aoudaghost, and later Katsina and Kano, were structural consequences of that position. Constantinople sat at the crossroads between Europe and Asia and extracted enormous wealth from that geography for over a thousand years. Timbuktu sat where the gold and salt trades intersected and grew exceptionally wealthy, connecting North Africa and the Mediterranean to the productive interior of West Africa. Whoever controlled such a position could tax trade moving in both directions, access goods otherwise unavailable, and hold a structural advantage over competitors. Geography does not determine history, but it sets the terms on which history unfolds.

The Sudan: Climate, Geography, Ecology

The African landscape is a varied one. Moving southward from the Sahara toward the equator, rainfall increases steadily and the vegetation responds in distinct bands. Each band runs roughly east-west across the continent, with the rainfall gradient running north-south.

To understand what this means in practice, follow an imaginary merchant setting out from Sijilmasa, the great Moroccan terminus of the trans-Saharan trade, sometime in the 11th or 12th century. He has loaded his camels with slabs of Saharan salt, bolts of North African cloth, and copper ingots from the Mediterranean world. His destination is the markets of the Sudan. His journey south will carry him through several worlds in succession, each one wetter, greener, and more densely populated than the last.

The northernmost inhabited zone is the Sahara itself: less than 150 millimetres of rain annually, vast, arid, traversable only with knowledge accumulated over generations. The Tamashek, Tubu and Amazigh peoples hold this world. They know where water sits beneath the surface and how the seasonal winds move. Our merchant cannot cross without them. He pays a toll and hires guides, folding the cost into the price his goods will command at the other end. The Sahara is dangerous and expensive, which is precisely why the goods that cross it are worth crossing it for.

After weeks of travel, the landscape shifts. The hard gravel plains of the deep Sahara give way to the Sahel proper, where annual rainfall runs between 150 and 600 millimetres. Semi-arid steppe. Thorny acacia scrub. A landscape suited to pastoral herding and seasonal movement, in most areas not adequate for settled cultivation. The few cities that exist here become all the more important for their scarcity. At Taghaza, our merchant loads additional blocks of rock salt, a commodity mined there by enslaved labourers under brutal conditions. Salt is so essential to life in the agricultural south that it commands near its weight in gold at certain markets. That simple fact drives the entire commercial logic of the Saharan world. At Timbuktu or Walata, he enters a different order of things entirely: a city of scholars, merchants and administrators sitting at the junction of the desert routes and the productive Sudan. He exchanges his salt and Mediterranean goods for gold, kola nuts and leather goods from the south. He hears news of the markets further inland. He weighs whether to press on or turn back.

He presses on. The landscape rewards his decision. Trees thicken. Grass grows tall between them. The soil deepens. The dusty, pale earth of the Sahara gives way to the red laterite soil familiar to anyone who has spent time in West Africa, rich and dense underfoot. Annual rainfall here ranges between 600 and 1,200 millimetres. The growing season runs long enough for reliable grain cultivation. Millet, sorghum, cotton, groundnuts. Cattle graze across the open woodland. Horses are kept and bred. Populations concentrate in numbers impossible further north. Cities grow large and stay large because the surrounding land can feed them across many consecutive years without exhaustion.

This is the bilād al-sūdān, the land of the black people, the broad belt of productive savanna the Arab geographers named and described across centuries of writing. In modern ecological terminology it carries the name Sudanian savanna, though the medieval Arabic name carries more historical weight. This is the zone our merchant has been trying to reach from the moment he loaded his camels in Sijilmasa. These markets, these consumers, and this world were the reason he carried everything across the desert.

He has arrived in the agricultural heartland of West Africa.

Further south still, the Guinea savanna thickens into closed forest, where rainfall exceeds 1,500 millimetres annually, the canopy closes over, and the tsetse fly kills cattle and makes cavalry warfare almost impossible. Powerful and institutionally sophisticated states flourished in this region: Oyo, Benin, Asante. Each connected to the same continent-spanning trade network through chains of regional merchants and intermediaries. Our merchant will not venture this far. His goods travel the rest of the way through other hands, through the networks of Mande-speaking Dyula traders and Hausa fatake who specialised in exactly this kind of relay commerce. He sells to them, and they carry his salt southward to people he will never meet.

What Each Zone Produces and Why it Matters

Salt commands near its weight in gold at certain markets.

The Saharan mines at Bilma, Kawar, and Taghaza produce a mineral that the agricultural populations of the Sudan belt cannot produce for themselves in adequate quantities. Salt preserves food, seasons it, and maintains the biological functions of people and their animals. Without access to it, agricultural communities weaken and decline. This biological necessity is what drives human beings to organise caravans of hundreds of animals across one of the most hostile environments on earth, month after month, generation after generation.

Gold flows in the opposite direction. The forest zone of West Africa contains some of the richest alluvial gold deposits in the pre-modern world, worked by Akan-speaking miners in what is today Ghana and Côte d’Ivoire. That gold fed the monetary systems of medieval North Africa and Europe. It funded the Fatimid Caliphate. It built the great mosques of Morocco. European monetary expansion from the 13th century onward depended substantially on West African gold long before Europeans had any direct access to West Africa at all. The forest zone also produces kola nuts, a mild, bitter stimulant that became the social currency of Muslim West Africa wherever Islamic law prohibited alcohol. Kola travels without refrigeration, remains potent for weeks, and carries ritual significance at ceremonies from Senegambia to the Niger Delta. Hausa merchants built entire trading empires on the kola circuit alone. The ancestors of Nigeria’s richest Man Aliko Dangote were Agalawa merchants who grew wealthy through the Kola trade.

Cotton cloth and leather goods move in every direction. The Sudanic region weaves and dyes cloth that North African and Saharan buyers prize. It tans hides into leather goods, sandals, saddlebags and harnesses, whose quality the Mediterranean world cannot match from its own resources.

None of these zones is self-sufficient. The pressure toward exchange is structural, not incidental. It does not require any particular ruler to decide to encourage trade. It arises from the complementarity of the zones themselves, from the fact that survival and prosperity in each depends on what the others produce. The political consequences of this logic are enormous. Controlling the transit points between zones, taxing the movement of goods across ecological boundaries, is one of the primary mechanisms of wealth accumulation in pre-modern West Africa. The empires that rise and dominate this region do not, for the most part, produce the commodities they trade. They sit between the producers and the consumers, and they tax the passage.

The Empires of the Sudan: Power Built on Position

The empire the Arabs called Ghana, and which its own people knew as Wagadu, built the first great demonstration of this logic. Rising in the western Sudan, probably by the 4th or 5th century CE, Wagadu sat between the gold-producing regions of the south and the North African merchants hungry for that gold. The state did not mine the gold. It taxed it.

The Arab geographer Al-Bakri, writing in 1068, recorded the precise mechanism. The king of Wagadu levied a tax of one dinar of gold on every donkey load of salt entering the country, and two dinars on every load leaving it. He charged five mithqals on a load of copper and ten mithqals on a load of finished goods. Gold nuggets found in the mines belonged entirely to the crown. Private citizens could trade gold dust freely, but the crown entirely monopolised nuggets, which could be used as money and accumulate political power. Al-Bakri described the king’s court audience: the ruler sat in a domed pavilion surrounded by horses wearing golden halters, dogs wearing golden collars guarding his doors, and ten pages standing to his right carrying shields and swords decorated with gold. Behind him stood the sons of subordinate kings, their hair interlaced with gold.

This is not just for the sake of flexing, although that played a part. It is a public display of the fiscal power the state extracts from its position in the trade network. The gold on those horses and dogs and sword hilts passed through Wagadu’s markets and Wagadu’s tax offices. They represent accumulated transit fees, turned into symbols of authority.

Wagadu extended its reach from Takrur in the Senegambia region east to the Niger, controlling the western trans-Saharan routes for several centuries. Its decline came gradually from the 11th century onward, through a combination of Almoravid pressure, internal rebellions, and the progressive southward shift of gold-producing communities beyond its reach. There is scholarly debate today about whether Almoravid pressure was military or commercial and how decisive a role it played in Wagadu’s decline.

Mali

Its successor took the same logic further and built something larger.

The Mali Empire of the Mansas reached from the Atlantic coast to the Niger bend at its height in the 13th and 14th centuries, incorporating the gold-producing Bambuk and Bure fields directly into its territory rather than simply taxing their output from a distance. This shift from transit taxation to direct control of production represented a significant intensification of the model. Mali did not abandon the transit fees; it added productive control on top of them.

The wealth this generated was genuinely staggering. In 1324, Mansa Musa, the ruler of Mali, performed the hajj to Mecca and passed through Cairo on the way. He travelled with a retinue reportedly numbering in the tens of thousands and distributed so much gold in Cairo and along the route that he single-handedly triggered an inflationary crisis in the Egyptian gold market. Contemporary Arabic sources record that the price of gold in Cairo had still not fully recovered twelve years later. One man’s pilgrimage gift-giving destabilised a regional monetary economy for over a decade. That is what the structural control of the Sudan’s gold output looked like in practice.

Under the Mansas, Timbuktu became the intellectual capital of the Sudan. The Sankore Mosque and its associated scholarly networks attracted students and teachers from across the Islamic world. Mali’s trading diaspora, the Wangara and Dyula merchants who spread out from the empire’s commercial networks, carried Islam southward and eastward into regions the empire itself never directly controlled. They built mosques in market towns across the savanna, established the contract forms and credit mechanisms of Islamic commercial law, and created the social infrastructure that later Islamic reform movements would draw on and contest.

Songhai

The last and among the largest of the great Sudanic empires rose from within Mali’s shadow and eventually consumed it.

Songhai centred on Gao in the Niger bend, a city that had been a significant commercial centre for centuries before the empire’s rise. Initially a tributary state under Mali, Songhai began asserting independence in the mid-15th century under Sunni Ali Ber, a military commander of exceptional energy who spent nearly three decades in almost continuous campaigning, capturing Timbuktu in 1468 and Jenne in 1473 and turning the Niger river into Songhai’s internal highway. Sunni Ali understood something that his predecessors had sometimes neglected: control of the river meant control of the grain trade that fed the cities of the Sudan, which meant leverage over the urban populations and scholarly classes on which commercial empires depended.

His successor, Askia Muhammad, who seized power in 1493 and built the empire’s administrative and intellectual infrastructure, brought Timbuktu to its peak. By the late 15th century, Timbuktu held a population that contemporary sources estimated at up to 100,000 people. The Sankore Mosque alone had 25,000 students. The city imported books from across North Africa and the Middle East and produced its own manuscript tradition that scholars are still cataloguing today. Askia Muhammad undertook his own famous hajj in 1496, arriving in Cairo and Mecca with gold but also with political questions: he sought a fatwa from the Egyptian scholar al-Suyuti legitimising his deposition of Sunni Ali’s dynasty. Religion and political authority were inseparable, and the caliphs and scholars of the east were the sources of legitimacy that Sudanic rulers sought.

Songhai’s collapse came suddenly. In 1591, a Moroccan army under Judar Pasha crossed the Sahara with something no Sudanic army had yet faced: firearms. At the Battle of Tondibi on the Niger, Moroccan muskets and cannon scattered a Songhai cavalry force many times larger. It was the first use of firearms south of the Sahara in a major engagement, and it exposed a structural vulnerability that the military architecture of the savanna empires had never needed to address before. Songhai fragmented. The Moroccan forces could conquer but not administer an empire of that scale from their North African base. The Sudan entered a period of political fragmentation that would define it for the following century.

Kanem-Bornu: The Ancient State of the Central Sudan

While Wagadu, Mali and Songhai rose and fell in the western Sudan, a different political tradition took root in the east and proved more durable than any of them.

The state centred on Lake Chad, known first as Kanem and later as Bornu, appears in Arabic sources as early as the 9th century. The Dugawa dynasty that founded it controlled the central trans-Saharan corridor running through the Fezzan in modern Libya, connecting the Mediterranean directly to the Lake Chad basin and the agricultural lands to its south and west. Where the western Sudan empires built their power on the gold routes, Kanem-Bornu built on a different set of commodities: enslaved people, ivory and natron, the sodium carbonate mineral used across the Arab world for soap-making, food preservation and glass production.

Islam arrived at the Kanem court around the 11th century, making it one of the earliest Muslim polities in Africa south of the Sahara. The conversion was not merely spiritual. It gave Kanem’s rulers access to the networks of Islamic scholarship, commerce and political legitimacy that connected the Sudan to the wider Muslim world. The Mai sent students to study in North Africa and brought back scholars to staff his administration. He corresponded with the Sultan of Morocco and the rulers of Egypt as a fellow Muslim sovereign. Islam provided the institutional language through which Kanem-Bornu organised its bureaucracy, justified its laws, and conducted its diplomacy.

That bureaucracy proved extraordinarily resilient. The state survived internal rebellions, external invasions. The realm persisted after the forced relocation of its capital from Kanem, east of the lake, to Bornu, west of it in the 14th century, a massive institutional disruption that most states would not have survived. It survived the disruptions of the 16th century that destroyed Songhai. It adapted, reformed, and persisted across ten centuries of continuous existence, making it arguably the most durable state institution in West African history.

That durability rested on a resource base that demands honest accounting. Bornu was not merely complicit in the trans-Saharan slave trade. For long periods, it organised and profited from it at scale. The state taxed the movement of enslaved people northward through its territory. Elite households depended on enslaved labour for agriculture, craft production and domestic work. Military expansion into the territories to the south and west was partly organised around the capture of people who would be sold northward or retained within the state economy. This was not an aberration imposed on an otherwise pristine political economy. The capture of people was structurally embedded in how Bornu accumulated and distributed surplus, how its ruling class maintained itself, and how it funded the military capacity that kept it intact. A history that omits this is not an honest history.

Bornu’s influence radiated westward into Hausaland across many centuries. The political vocabulary of the Hausa city-states carries the fingerprints of this contact. The title Ciroma, used in Hausa courts for a senior ranked position, is a Kanuri borrowing from Bornu. Galadima, another major Hausa title, has the same eastern roots. The Bayajidda foundational legend, which we will examine carefully in the next essay, routes the origin of the Hausa states through Bornu for reasons that are not accidental. Bornu was the dominant power of the central Sudan for most of the period in which the Hausa city-states were forming their institutions. Its administrative models, its Islamic scholarly networks, and its commercial relationships all shaped what Hausaland became. The reign of Mai Idris Alooma was the Apogee of the polity and it would slowly decline in the centuries following his reign. I will cover his reign with the care it deserves in its own essay.

Bornu’s power and influence would wane over the centuries, driven by shifting trade routes, environmental changes and the rise of powerful rivals like the Usmanid/Sokoto Caliphate. The state met its end in 1900, when Rabeh Zubayr, a Sudanese warlord and former slave soldier who had carved his way across the central Sudan with a disciplined firearms-equipped army, besieged and destroyed the Bornu capital. Rabeh’s conquest coincided almost exactly with the arrival of French colonial forces from the west and British forces from the south. The three-way collision finished what a millennium of rivals had failed to do. Bornu, which had outlasted Wagadu, Mali and Songhai by centuries, fell not to any single force but to the specific conjuncture of the 1890s, when the internal disruption of Rabeh’s campaign intersected with the external pressure of European colonial conquest at the worst possible moment.

Our merchant from Sijilmasa, had he lived long enough and travelled far enough east, would have recognised the world of Bornu: the same logic of transit taxation, the same integration of Islamic commercial law into the fabric of trade, the same cities growing wealthy at the junction of ecological zones. But he would also have noticed something different about the political terrain further west, in the territory that Bornu influenced but did not control. A cluster of city-states, each independent, each competitive, each building its own institutions and its own commercial networks. Fragmented where Bornu was unified. Commercially distributed where Bornu was centrally administered. Younger in its political consolidation but extraordinarily dynamic.

Why Any of this Matters

The empires described in this essay did not exist in a separate, sealed-off past with no connection to the present. They were the product of specific material conditions, specific ecological positions, and institutional choices made over centuries. Wagadu’s wealth stemmed from the trans-Saharan trade, Songhai’s internal highway was the Niger river, and Bornu’s millennium-long anchor was the Lake Chad basin; these assets did not vanish with the empires’ demise. The geography remained. The ecological logic endured. Trade routes remained, at least until colonial borders, railway lines and artificial tariff walls were drawn through them.

What changed was who controlled them and in whose interest they operated.

The colonial partition of the 1880s and 1890s did not encounter an empty or stagnant landscape. It encountered the successor states of a thousand years of Sudanic political development, states that had survived the collapse of Songhai, the disruption of the trans-Saharan routes, and centuries of internal competition. What colonialism did was reorganise that landscape. It redirected trade routes toward coastal ports and away from the Saharan corridors that had sustained the interior for centuries. Wherever it preserved certain institutions, the emirate system in northern Nigeria being the most consequential example, it did so in forms useful to administrators rather than local populations. It created borders that cut through the agricultural zones, pastoral routes and commercial networks that the ecological logic of the region had generated over centuries. And it extracted resources with none of the internal redistribution, however unequal and often brutal, that the older state systems had practised. The Sahelian Juntas claim to have seized power to right those wrongs, but only time will tell.

The coup belt is the inheritance of that reorganisation. The states collapsing today did not build on the institutional foundations of Wagadu, Mali, or Bornu. They were built on colonial administrative frameworks that prioritised control over capacity, extraction over development, and the convenience of outside powers over the coherence of local political economies. The Sahel crisis is not evidence that this region cannot sustain complex political life. The record described in this essay is the evidence against that claim. It is evidence that the specific political structures imposed over the last century have failed, and that understanding why requires going further back than the coups, further back than independence, further back than colonialism itself.

That is the work of this series: https://thesahelianrecord7.substack.com/

Feature Image: Jillian Amatt – Artistic Voyages on Unsplash

Sources:

Al-Bakri, Kitāb al-Masālik wa-al-Mamālik (Book of Routes and Realms), c. 1068, in Basil Davidson, The African Past (Penguin Books, 1966), p. 81

Brooks, George E., Landlords and Strangers: Ecology, Society, and Trade in Western Africa, 1000–1630 (Westview Press, 1993)

Hunwick, John O., Timbuktu and the Songhay Empire (Brill, 1999)

Last, Murray, The Sokoto Caliphate (Longmans, 1967)

Levtzion, Nehemia, Ancient Ghana and Mali (Methuen, 1973)

Levtzion, Nehemia and J.F.P. Hopkins (eds.), Corpus of Early Arabic Sources for West African History (Cambridge University Press, 1981)

Lovejoy, Paul E., Salt of the Desert Sun (Cambridge University Press, 1986)

Lovejoy, Paul E., Transformations in Slavery: A History of Slavery in Africa (Cambridge University Press, 1983)

Lovejoy, Paul E., Caravans of Kola (Ahmadu Bello University Press, 1980)

Trimingham, J. Spencer, A History of Islam in West Africa (Oxford University Press, 1962)

Webb, James L.A. Jr., Desert Frontier: Ecological and Economic Change Along the Western Sahel, 1600–1850 (University of Wisconsin Press, 1995)