Colonial Origins of Comparative Development
Based on Wikipedia: Colonial Origins of Comparative Development
In 1998, two economists, Daron Acemoglu, Simon Johnson, and James A. Robinson, published a paper that would fracture the consensus on why some nations are rich and others remain desperately poor. They did not look at geography, culture, or the innate wisdom of a population. Instead, they looked at the dead. They looked at the mortality rates of European settlers in the early colonial era and found a correlation so stark it redefined the study of economic development. The thesis was deceptively simple: where Europeans could not settle because of disease, they set up extractive institutions designed to plunder resources and leave; where they could settle, they built inclusive institutions designed to grow a society. The result is a world map of inequality drawn not by the climate, but by the choice to steal or to build.
To understand the magnitude of this claim, one must first discard the intuition that wealth is a natural outcome of hard work or favorable soil. For decades, the dominant theory, championed by scholars like Jeffrey Sachs, argued that geography was destiny. Tropical climates bred disease, hindered agriculture, and trapped nations in poverty. The highlands of Ethiopia or the rainforests of the Congo were doomed by their latitudes. Acemoglu, Johnson, and Robinson, often referred to as AJR, challenged this with a weaponized dataset. They gathered mortality data for European settlers from the 17th to the 19th centuries in colonies across Africa, Asia, and the Americas. They were not interested in the soldiers or the administrators; they were interested in the average European who arrived with no immunity to local pathogens.
The numbers were grim. In West Africa, particularly in the Congo and the Gold Coast, settler mortality rates were astronomical, often exceeding 80 percent in the first few years of arrival. The air was thick with malaria, yellow fever, and sleeping sickness. In contrast, in places like New England, Australia, and Argentina, the mortality rates were comparable to those in Europe. The environment was welcoming. This biological reality dictated the colonial strategy. When a European power arrived in a high-mortality zone, they did not send families to farm, build schools, or establish courts. They sent soldiers and a small cadre of administrators whose sole purpose was to extract wealth and ship it back to the metropole. These became the "extractive states."
Conversely, in low-mortality zones, Europeans brought their wives, their children, and their lawyers. They built cities that mirrored London or Boston. They created property rights, checks on executive power, and competitive markets. These became the "inclusive states." The critical insight of AJR was not just that these two paths existed, but that the initial conditions of settler mortality became locked in. The institutions built in 1650 did not vanish when the colonial flag was lowered in 1950. The extractive machinery of the Belgian Congo, designed to harvest rubber and diamonds for King Leopold II, did not simply disappear to make way for democracy. It mutated. The local elites who took power after independence inherited the same tools of coercion, the same centralized bureaucracies, and the same incentives to extract rather than produce.
This is the core of the "reversal of fortune" hypothesis. In 1500, the richest and most advanced societies on Earth were often in the regions that would later become poor. The Aztec and Inca empires, the Mogul Empire in India, and the powerful city-states of West Africa were centers of wealth and population density. By 1995, these exact same regions were among the poorest. Meanwhile, the sparsely populated, "backward" lands of North America and Australia became the wealthiest. Geography could not explain this. If the tropics were the problem, the Aztecs should have remained poor, yet they were thriving before the conquest. The difference was the colonial experience. In the rich, dense areas, the Europeans found too many people to simply kill or displace easily. Instead, they enslaved them or co-opted them into a rigid hierarchy. They built institutions that concentrated power in the hands of a few to facilitate extraction. In the poor, empty areas, they had to build institutions that protected property and encouraged immigration to make the land productive.
The human cost of this divergence is impossible to overstate. It is not merely a matter of GDP per capita charts. It is the difference between a child in a former extractive colony who dies of preventable malaria because the state has no incentive to build a health system, and a child in a former inclusive colony who lives a long, productive life. The institutions of extraction are designed to fail the majority. They rely on the suppression of civil society, the absence of the rule of law, and the concentration of wealth. When a state is built to extract, the elite have no reason to invest in public goods. Why build a road if the population is too poor to pay taxes? Why fund schools if an educated populace might demand a seat at the table?
Critics were quick to pounce. The most prominent challenge came from Nathan Nunn and Daron Acemoglu's later collaborators, but also from economists like Jared Diamond and, more aggressively, from Olivier Blanchard and others who questioned the instrumentality of the settler mortality data. The critique often focused on the "exclusion" of data, a point that has fueled decades of academic warfare. Critics argued that the mortality data was sparse, relying on estimates from a handful of colonies, and that the statistical instruments used to isolate the causal effect were flawed. They pointed out that settler mortality might correlate with other factors, such as the level of development at the time of contact, or that the data was cherry-picked to fit the narrative.
There is a specific controversy regarding the work of David Albouy, who in 2012 published a scathing critique titled "The Colonial Origins of Comparative Development: An Empirical Investigation." Albouy argued that the original AJR dataset contained significant errors. He claimed that the mortality rates for many colonies were misattributed or that the data points were so few that the statistical significance of the findings evaporated. Albouy suggested that when you correct the data, the link between settler mortality and modern institutions weakens considerably. He accused the original authors of omitting half the data from the original sources, a charge that sent shockwaves through the field. The debate was not just about numbers; it was about the validity of the entire framework that attributes modern poverty to colonial choices.
Yet, even amidst this statistical turmoil, the narrative held a powerful grip on the global consciousness. Why? Because it offered a moral clarity that geography lacked. Geography is cruel, but it is impersonal. It does not choose to be cruel; it simply is. Colonialism, however, was a deliberate human project. It was a choice made by kings, merchants, and settlers to build a system that worked for them and failed everyone else. The AJR thesis suggests that the poverty of the Global South is not a natural state of being, but the result of a specific historical design. It shifts the blame from the "lazy native" or the "tropical curse" to the structures of power that were imposed and maintained.
The essay of history, in this light, is not a story of inevitable progress but of path dependence. Once a path is chosen, it is incredibly difficult to leave. In the extractive colonies, the elite class, whether indigenous or foreign, had a vested interest in maintaining the status quo. The state was a tool for their enrichment. In the inclusive colonies, the broad distribution of political power created a feedback loop where the majority demanded better schools, better roads, and better laws, further entrenching the inclusive institutions. This is the "virtuous cycle" versus the "vicious cycle." The vicious cycle of extraction is self-reinforcing. The more you extract, the more you need to suppress, and the more you suppress, the less you can develop.
Consider the case of the Congo. Under King Leopold II, the Congo Free State was the apotheosis of the extractive institution. It was a private fiefdom where the sole objective was the extraction of rubber. The system relied on the mutilation of workers, the burning of villages, and a military force that operated with impunity. The mortality rate was staggering, with estimates suggesting that the population of the Congo was halved during this period. When Belgium took over, the extractive nature did not end; it changed form. The infrastructure built was not for the Congolese, but for the movement of resources to the coast. The political institutions remained exclusionary. When independence came in 1960, the state collapsed into chaos, not because the people were incapable of self-rule, but because the state had never been built to serve them. It was a shell, a hollow vessel of extraction waiting for a new master.
Contrast this with the United States. The settlers in New England arrived with a mortality rate low enough that they brought their families. They established town halls, representative assemblies, and a common law system that, while deeply flawed in its treatment of indigenous peoples and enslaved Africans, created a framework for broad political participation among the colonists. Over time, this framework expanded. The institutions were inclusive enough to allow for a broad distribution of power, which in turn encouraged investment in human capital and technology. The result was a society that could adapt and innovate. The institutions were not perfect, but they were flexible. They allowed for the contestation of power, which prevented any single group from locking in a system of total extraction.
The debate continues, fueled by the sheer complexity of history. Albouy's critique, and others like it, remind us that history is messy. Data is incomplete. Mortality records from the 17th century are often guesses based on ship logs and missionary diaries. The economic models that try to distill centuries of human suffering into a regression coefficient are inevitably reductive. But the core truth of the colonial origins thesis remains resilient. It is the observation that the way a society is organized at its inception—whether it is designed to include or to extract—sets a trajectory that is incredibly hard to reverse.
The human cost of this divergence is measured in the quiet, daily tragedies of the developing world. It is the farmer who cannot get credit because the banks are owned by a cartel of elites who have no interest in lending to the poor. It is the teacher who is paid nothing because the state budget is siphoned off by corrupt officials. It is the mother who loses her child to a disease that a functioning health system could have cured. These are not accidents. They are the predictable outcomes of institutions that were designed for a different purpose. They are the legacy of a system that viewed certain populations as resources to be consumed rather than citizens to be served.
In the end, the "Colonial Origins of Comparative Development" is not just an economic theory. It is a history of power. It asks us to look at the modern map of the world and see the scars of the past. It challenges the notion that development is a matter of waiting for the right conditions or the right culture. Instead, it suggests that development is a matter of political choice. The institutions that allow for prosperity were not inevitable; they were built, often in the face of great resistance, by people who believed in a different future. And the institutions that perpetuate poverty were also built, by people who believed in a future where only a few would thrive.
The silence of the archives, the gaps in the mortality data, and the fierce arguments between economists do not change the fundamental reality. The world we live in today is the result of a choice made centuries ago. The choice to settle or to extract. The choice to build or to plunder. And until we acknowledge that the roots of our modern inequality are deeply embedded in those colonial decisions, we will continue to treat the symptoms while ignoring the disease. The data may be imperfect, the models may be contested, but the story they tell is one of the most important in human history. It is a story of how the past shapes the present, not through the whims of fate, but through the enduring power of human institutions. And it is a story that demands we look at the dead not just as statistics, but as the architects of our current world.