The study of economic inequality is not all doom and gloom—there are some rays of sunshine to be found. While inequality between individuals across the globe remains vast, rapid growth in emerging market economies—especially in China and India—has lifted hundreds of millions of people out of poverty and into the global middle class. As incomes rise, people live longer, maternal and child mortality decline, access to clean water and electricity expands, leisure increases, education improves, and people report higher life satisfaction.
One way to see this progress is to note that in 1990, countries outside the G7 accounted for only 37 percent of world GDP. Today, they produce over half, and by 2040 could generate two-thirds of global output. Another measure, the global Gini coefficient, which summarizes income inequality worldwide, has fallen from 0.72 in 2000 to 0.67 in 2020. This indicates meaningful progress—though global inequality remains higher than that within even the most unequal countries.
The good news stalls
Unfortunately, the recent trajectory is less encouraging. The decline in global inequality that occurred between 1990 and 2015 appears to have stalled. The COVID-19 pandemic hit developing economies especially hard, reversing years of progress in health and education. At the same time, a growing number of countries have become less open, less democratic, less inclusive, and less productive.
Between 2000 and 2015, the world’s 58 poorest nations grew at roughly twice the rate of rich countries. Since then, however, that convergence has faded. Many developing and middle-income countries are now growing more slowly than the rich world, and improvements in public health, education, and opportunity have stagnated.
From global to local: the new shape of inequality
The more troubling shift is that global inequality is becoming less global and more local. To understand this, it helps to distinguish two components of global inequality:
- Between-country inequality: the income gap between nations.
- Within-country inequality: the gap between rich and poor citizens inside each nation.
For most of modern history, the biggest divide was between countries. From 1820 to 1980, rich countries surged ahead while most others lagged. But within many countries—particularly in the West—inequality declined during the postwar period, thanks to strong welfare states, progressive taxation, and inclusive growth.
Your country of birth matters less than it once did—but your neighborhood matters more.
Since around 1980, these trends have reversed. Between-country inequality has fallen as developing nations caught up. But within-country inequality has surged almost everywhere. According to research by Chancel and Piketty, the global picture has now flipped: in 1980, about two-thirds of global inequality came from differences between countries; today, about two-thirds comes from inequality within countries.
This means that your country of birth matters a bit less in determining your income than it once did—but your neighborhood matters more. Inequality is now something most people can see around them, not just read about in global reports.
Inequality at home hurts more
While inequality between nations is abstract, inequality within nations is intensely personal. People judge their wellbeing not only by absolute income but by comparison—how they are doing relative to neighbors, colleagues, or those they see online. When the middle class feels squeezed—pressed from below by those catching up and from above by the rich racing ahead—frustration grows.
This frustration takes different forms in different places. In the United States, it may be “keeping up with the Joneses.” In China, it’s keeping up with the Zhangs. In India, the Kumars compare themselves to the success of other Kumars. But the underlying emotion is the same: anxiety and resentment over a system that feels unfair.
The social and political consequences
Inequality is not only an economic problem—it is also social and political. When people believe that the economic system no longer delivers its benefits equitably, they begin to lose faith in its legitimacy. That loss of trust can lead people to withdraw from civic life, sabotage institutions, or empower populists who promise to upend the system altogether.
In this way, growing domestic inequality contributes directly to political polarization, social fragmentation, and the erosion of democratic norms. More unequal societies tend to be less cooperative and more conflict-prone. They exhibit lower social trust, weaker public health, worse educational outcomes, less mobility between generations, and greater conflict prone crises—economic, political, or environmental.
A country is not just a collection of individuals but a shared social contract: a web of norms, laws, and expectations that allows people to coexist and cooperate. When too many citizens feel excluded from the benefits of growth, that web begins to fray.
Why this shift matters so deeply
The transformation of global inequality into local inequality has profound implications. When inequality was mainly between countries, it was easier to frame solutions in international terms—development aid, trade access, technology transfer. But when inequality is primarily within countries, the responsibility lies with domestic institutions: governments, tax systems, education, and labor markets.
This is a much tougher challenge. It requires political will, broad social trust, and functioning democratic processes, precisely the things being undermined by inequality itself. It is a vicious cycle: inequality weakens democracy, and weakened democracy makes it harder to address inequality.
Paths forward
What can societies do to counter rising inequality? Economists generally point to two complementary sets of policies:
- Structural reforms that make markets fairer and more competitive—such as improving education, strengthening labor protections, and reducing monopolistic power.
- Fiscal redistribution, through more progressive taxation and social transfers that raise incomes for those at the bottom and middle.
These are not new ideas, and they have been shown to work. The question is no longer technical but political: are our societies still capable of adopting such measures? Can democratic systems still produce the compromises required to sustain shared prosperity?
The stakes for democracy and capitalism
If nothing is done to mitigate growing inequality, it will not be an economic failure. We already know what policies could help. It will not even be, strictly speaking, a political failure. It will be a failure of collective will, a failure of us.
The real danger is not just economic stagnation but the corrosion of the democratic and capitalist systems that have delivered unprecedented human progress. For centuries, these systems relied on a tacit promise: that effort and talent would be rewarded and that growth would be broadly shared. If that promise continues to break down, the legitimacy of those systems will erode as well.
In sum, global inequality has gone local. The gap between nations has narrowed, but the gap between neighbors has widened. And when inequality is visible in our own communities, it threatens not just economic balance sheets but the very foundations of social trust and democracy.
