Growing Economic Divide: Developed vs. Under-developed Nations

A small cluster of nations controls most of the planet’s wealth, while billions of people in the rest of the world struggle to secure basic needs. This is not an exaggeration. According to Oxfam, more than two-thirds of global wealth is held by developed nations, even though they make up a far smaller share of the world’s population. The economic distance between the developed and the under-developed world is not closing. In many respects it is growing wider. Understanding why this happens, and why decades of international effort have not fixed it, is one of the central problems in the study of international relations.

What the wealth gap actually looks like 🔗

The clearest way to grasp the divide is through numbers. The World Bank sorts countries into income groups based on Gross National Income (GNI) per capita, calculated using its Atlas method. For the 2026 fiscal year, a high-income economy is one with a GNI per capita above $13,935, while a low-income economy sits at $1,135 or less. That is a gap of more than twelve times between the floor of the rich world and the ceiling of the poorest.

This is the difference between the structural realities of daily life. In a high-income country, a citizen can expect reliable electricity, schooling, healthcare, and infrastructure. In a low-income country, the same person may lack consistent access to any of these. As the economist Max Roser of Our World in Data points out, where a person is born matters more for their prosperity than their individual talent or effort. Geography, in effect, sets the ceiling on opportunity.

The concentration of wealth has only intensified. By 2025, the richest 10 percent of the global population owned roughly 75 percent of all wealth, while the bottom half controlled just 2 percent. The same analysis notes that billionaire wealth has been growing at nearly twice the rate of the wealth held by the poorest half of humanity. The gap is not a static feature of the world economy; it is actively expanding.

Why the gap keeps widening 🔗

If trade and globalization were supposed to lift everyone, why has the divide grown? The answer lies in how the global economy is structured. The benefits of integration have not been shared equally.

The advantage of industrial and technological power 🔗

Developed nations dominate the production of manufactured goods, advanced technology, and high-value services. Under-developed nations, by contrast, have historically depended on exporting raw materials and primary commodities such as crops, minerals, and ores. This split is the root of a persistent disadvantage. Researchers note that high-income countries possess the capital, infrastructure, and technological edge to capture most of the gains from globalization, while low-income countries struggle to compete. The result is an economic hierarchy that reinforces itself: the nations already ahead keep pulling further ahead.

The Prebisch-Singer thesis 🔗

One of the most influential explanations in development economics is the Prebisch-Singer thesis, formulated in the 1950s by economists Raúl Prebisch and Hans Singer. It argues that the terms of trade for primary commodities tend to deteriorate over time relative to manufactured goods. In plain terms, the things poorer countries sell get cheaper compared to the things they need to buy.

The logic is straightforward. As global incomes rise, demand for manufactured products grows faster than demand for raw materials. Technological progress also makes manufacturing more productive in ways that primary production cannot match. Hans Singer captured the troubling implication in a 1949 United Nations report, noting that under-developed countries effectively helped sustain a rising standard of living in the industrialized world through the prices they paid for imports, without receiving an equivalent gain for their own exports. A country exporting cotton or coffee has to sell more and more each year just to afford the same machinery or medicine from abroad. This is a slow but relentless drain on the resources of the developing world.

Subsidies and uneven competition 🔗

The playing field is further tilted by domestic policies in rich nations. Developed countries heavily subsidize their own agricultural sectors, allowing their farm products to sell cheaply on world markets. Under-developed nations cannot afford comparable support for their farmers. Their agricultural exports become less competitive, undercutting one of the few sectors where they might otherwise hold an advantage. The competition, in other words, is not between equals.

The institutions meant to bridge the gap 🔗

The international community did recognize this problem, and it built institutions to address it. The two most significant were the General Agreement on Tariffs and Trade (GATT) and the United Nations Conference on Trade and Development (UNCTAD). Their record, however, is a study in good intentions meeting hard power.

The promise of UNCTAD 🔗

UNCTAD was created in 1964 precisely because developing countries felt that existing bodies were not built to serve their interests. It emerged from concerns that institutions like GATT, the IMF, and the World Bank were not properly organized to handle the particular problems of developing countries. At its very first session, developing nations banded together to form the Group of 77, a coalition designed to give them a collective voice. The Argentine economist Raúl Prebisch, the same figure behind the terms-of-trade thesis, became its founding Secretary-General.

UNCTAD did achieve real things. It conceived the Generalized System of Preferences, which lowered tariffs on manufactured exports from developing countries, and it provided crucial technical support during later trade negotiations. But its core ambition, a fundamental rebalancing of the global economic order, ran into a wall.

Why the efforts fell short 🔗

In the 1970s, developing countries pushed for a New International Economic Order (NIEO), a sweeping set of proposals to reduce dependency and inequality. The effort failed. As one recent review of UNCTAD’s work observes, those negotiations fell victim to resistance from advanced economies and divisions among the developing countries themselves. Prebisch had in fact resigned from UNCTAD back in 1969, frustrated that multilateral forums could not produce meaningful systemic change against the weight of great-power interests.

This is the heart of the problem. The institutions that govern the global economy reflect the power of those who built them. Developed nations, holding the bulk of economic and financial clout, set the terms of negotiation. Even the UN Secretary-General has acknowledged that trade has become a double-edged sword, producing both prosperity and inequality, interconnection and dependence. A forum can give weaker nations a voice, but a voice is not the same as the power to change the rules.

The consequences of a divided world 🔗

The persistence of this gap is not an abstract academic concern. It translates directly into human suffering. Around 720 million people, roughly nine percent of the world’s population, currently live in poverty, lacking the means for basic nutrition, clean water, shelter, and education.

The divide also has a self-perpetuating quality. Low income limits a country’s ability to invest in education, health, and infrastructure, the very things needed to climb out of underdevelopment. Heavy reliance on a narrow range of commodity exports leaves these economies vulnerable to price shocks and debt crises. When poorer nations borrow to finance development, falling export earnings can leave them unable to repay, trapping them in cycles of debt that deepen rather than relieve their dependence.

A more complicated picture 🔗

It would be misleading to present the situation as entirely fixed. There has been genuine movement. World Bank data shows that the share of low-income countries fell from 30 percent in 1987 to about 12 percent by 2023, while the share of high-income countries rose. Rapidly industrializing economies, including India and China, have lifted hundreds of millions out of extreme poverty by moving beyond raw commodities into manufacturing and services.

Yet this progress sits alongside a stubborn truth. Globalization appears to have reduced inequality between some nations while sharply increasing inequality within them. Research suggests globalization has narrowed wealth inequality between countries even as it has widened the gap inside them. The story is not simply rich nations versus poor nations anymore; it is also a global elite pulling away from everyone else. For the poorest countries, especially in Sub-Saharan Africa, the old pattern of commodity dependence and deteriorating terms of trade continues to hold them back.

What this means for the study of international relations 🔗

The widening economic divide is a reminder that international relations is not only about wars and diplomacy. It is also about who controls resources, who writes the rules of trade, and who benefits from them. The structures of the global economy are not neutral. They were designed by powerful states and they tend to serve powerful states.

This is why scholars connect the wealth gap to ideas like dependency theory, which argues that the global trade order systematically extracts wealth from the developing world to enrich the developed world. Whether or not one accepts every claim of that framework, the underlying observation is hard to dismiss: the same patterns of advantage have persisted for generations, and the institutions meant to correct them have repeatedly run into the limits of the power that surrounds them. Closing the gap, if it can be closed at all, will require more than goodwill. It will require changing who holds the leverage in the global economy.

What do you think? If international institutions like UNCTAD have struggled for sixty years to rebalance global trade, what kind of reform could realistically shift the balance of economic power? And should the focus be on narrowing the gap between nations, the growing inequality within them, or both at once?

References

1. https://www.weforum.org/stories/2024/02/inequality-developing-countries-women-oxfam/
2. https://ourworldindata.org/grapher/world-bank-income-groups
3. https://ourworldindata.org/the-history-of-global-economic-inequality
4. https://www.aljazeera.com/news/2025/12/10/where-in-the-world-are-wealth-and-income-most-unequal
5. https://www.abacademies.org/articles/globalization-and-income-inequality-assessing-economic-disparities-in-the-21st-century-17299.html
6. https://www.tutor2u.net/economics/reference/the-prebisch-singer-hypothesis
7. https://en.wikipedia.org/wiki/Hans_Singer
8. https://en.wikipedia.org/wiki/UN_Trade_and_Development
9. https://onlinelibrary.wiley.com/doi/10.1111/dech.70030
10. https://press.un.org/en/2024/sgsm22266.doc.htm
11. https://www.oxfamamerica.org/explore/issues/economic-justice/income-and-wealth-inequality/
12. https://blogs.worldbank.org/en/opendata/world-bank-country-classifications-by-income-level-for-2024-2025
13. https://worldpopulationreview.com/country-rankings/wealth-inequality-by-country