What Slave-Trading Systems Are We Part of Today?

What Slave-Trading Systems Are We Part of Today?

By: Micheil Banoub

Histories of the transatlantic slave trade rightly emphasize its brutality. Millions of people were kidnapped, separated from their families, and subjected to unimaginable suffering. Those horrors deserve to remain at the center of how slavery is remembered.

Yet focusing exclusively on the cruelty of slavery risks obscuring one of its most important lessons. Slavery did not endure for centuries simply because a handful of evil people imposed it on everyone else. It survived because entire economic, political, and social systems benefited from it and normalized it. Merchants financed it. Governments regulated it. Local rulers participated in it. Religious institutions sometimes justified it. Consumers benefited from it. Ordinary people learned to live alongside it.

That may be the more unsettling lesson.

If history teaches anything, it is that societies are remarkably good at normalizing systems of exploitation when they generate wealth, stability, or convenience. The challenge, then, is not merely to condemn the moral failures of previous generations. It is to ask what blind spots exist within our own.

That question became particularly vivid during my visit to Cape Coast Castle in Ghana. Perched above the Atlantic Ocean, the castle is breathtakingly beautiful. Inside, however, stands the "Door of No Return," through which countless enslaved Africans made their final journey from their homeland.

The site tells a familiar story of European involvement in the transatlantic slave trade. Yet conversations with Ghanaians offered a more complicated picture. While European powers industrialized and expanded the trade, the system also depended on local African rulers, merchants, and intermediaries. Similar patterns existed in East Africa, where Arab-Swahili traders worked with local chiefs to transport enslaved people toward coastal markets.

The observation challenges a simplistic narrative in which history is divided neatly between villains and victims. Instead, it suggests something far more uncomfortable: exploitative systems often survive because many different actors, each pursuing narrow self-interest, collectively sustain them.

Slavery as an Economic System

The nineteenth-century Scottish missionary and explorer David Livingstone documented this reality during his travels across present-day Zambia, Tanzania, and the Congo.

His writings describe slave caravans stretching across East Africa, transporting captives toward coastal ports such as Zanzibar. Livingstone condemned the cruelty he witnessed, but his accounts also reveal how deeply embedded slavery had become within regional economies.

Chiefs exchanged captives for firearms, textiles, and other trade goods. Merchants earned profits from buying and selling enslaved people. Caravan operators made a living transporting them. Foreign buyers created the demand that made the entire system economically viable.

No single group sustained slavery. Each participant performed a different function. Together, they created an ecosystem that perpetuated exploitation. This distinction matters because systems rarely survive on ideology alone. More often, they persist because incentives align. Individuals pursue wealth, security, or opportunity without necessarily accepting responsibility for the broader consequences of the system they help sustain. History suggests that this pattern extends well beyond slavery.

The Normalization of Exploitation

Each generation inherits institutions and practices so deeply entrenched that their existence is taken for granted. Slavery was once legal across much of the world. It generated enormous wealth, shaped international trade, and underpinned entire economies. Many people who participated in it did not consider themselves immoral. They regarded themselves as merchants, laborers, financiers, transport operators, or government officials performing legitimate work within an accepted economic order. 

This is perhaps history's most uncomfortable lesson.

Human beings possess an extraordinary capacity to normalize injustice when it becomes economically useful, socially accepted, or geographically distant. The victims gradually disappear from view. The system becomes ordinary. Life continues.

History repeatedly demonstrates that societies struggle to recognize their deepest moral failures while they are unfolding. Moral clarity often arrives only after institutions collapse and incentives change.

Modern Supply Chains and Moral Distance

The global economy raises similar questions today. Modern supply chains have lifted hundreds of millions of people out of poverty and generated extraordinary economic growth. At the same time, they have exposed persistent concerns regarding labor standards, forced labor, child labor, unsafe working conditions, and the treatment of migrant workers in various industries and countries.

The point is not that these practices are equivalent to slavery. They are not. Rather, they illustrate a similar structural problem. Consumers, investors, and businesses are often separated from production by thousands of miles and multiple layers of suppliers. That distance makes it easier to enjoy inexpensive goods without fully confronting the conditions under which they were produced. Economists sometimes refer to this as an information problem. Ethicists might describe it as moral distance. Either way, the result is similar: people benefit from systems whose human costs remain largely invisible.

Few consumers intentionally support exploitative labor practices. Most simply purchase affordable products without knowing—or thinking deeply about—the complex supply chains behind them. That is precisely how normalization occurs. The issue extends beyond manufacturing. Questions about migrant labor in construction, child labor in parts of the cocoa industry, forced labor in segments of global fishing, and unsafe conditions in mineral extraction all raise difficult questions about the hidden costs embedded within global markets.

These issues differ substantially in scale, context, and severity. Yet they share one important characteristic: the economic benefits are immediate, while the human costs are often distant from those who ultimately benefit.

What This Means for Investors and Business Leaders

For investors, entrepreneurs, and corporate leaders, the lesson is not to withdraw from global markets. Markets have been among the greatest drivers of prosperity in human history.

The lesson is that efficiency and profitability are not, by themselves, measures of prosperity or ethical success.

Investment decisions shape incentives. Procurement decisions shape incentives. Consumer demand shapes incentives.

Businesses increasingly recognize this reality through supplier audits, labor standards, traceability initiatives, and environmental, social, and governance practices. These efforts are imperfect and often debated, but they reflect an important recognition: organizations bear responsibility not only for what they produce, but also for how their products are made.

History suggests that ignoring these questions carries its own risks. Many of history's most troubling institutions persisted not because they lacked critics, but because enough people believed someone else was responsible.

Learning the Right Lesson from History

I was fortunate to do a civil rights trip to the south of the United States during my time at MIT. We followed the Museums dedicated to slavery and civil rights perform an essential role by preserving memory and honoring those who suffered. But perhaps they also invite a second lesson.

The enduring significance of slavery is not simply that it reveals how cruel human beings can become. It reveals how adaptable they are.

Ordinary people can gradually accept extraordinary injustice when it becomes embedded within economic systems, social norms, and political institutions. That realization should produce humility rather than self-righteousness.

It is easy to identify the moral failures of previous centuries. The greater challenge is recognizing the blind spots of our own. History rarely announces them in advance. Future generations will almost certainly judge aspects of today's economy more harshly than we do now. The question is not whether such blind spots exist, but whether we are willing to examine the incentives, institutions, and assumptions that make them appear normal.