The global economic landscape has undergone a striking transformation over the past four decades, with countries moving between income categories as economies expanded, living standards changed and development patterns evolved.

A World Bank Data graphic titled “Evolution of the World Bank Group Country Income Classifications” illustrates this changing picture through maps for 1987, 1997, 2007, 2017 and 2025.

The visualization divides economies into four principal income groups: high income, upper-middle income, lower-middle income and low income, while countries without an applicable classification are shown separately.

A Changing Global Economic Landscape

The 1987 map presents a world in which high-income economies were concentrated largely in North America, Western Europe, Japan, Australia and a limited number of other economies. Large parts of Africa and Asia were classified in the lower-income categories.

By 1997, the distribution had already begun to shift. Several economies had moved upward, while changes in economic performance and national income altered the classification of countries across different regions.

The 2007 map shows another notable stage in the transformation. A larger number of economies appear in the upper-middle-income category, particularly across parts of Asia, Latin America and other developing regions.

The trend becomes even more visible in the 2017 snapshot. More countries are represented in the higher income categories than in the earlier maps, reflecting decades of economic growth and changes in average income levels.

2025 Map Shows Further Progress

The latest map in the graphic, representing 2025, provides a markedly different picture from the one shown for 1987. High-income economies occupy a broader share of the global map, while several countries that were previously classified in lower categories have moved into middle-income groups.

This does not mean that economic development has been uniform. The 2025 map continues to show significant concentrations of low-income economies, particularly in parts of Africa, demonstrating the considerable differences that remain between countries.

Income Classification Is Not the Same as Overall Development

The World Bank’s income classifications are based on gross national income per capita and are used to group economies according to their income levels. A country’s movement between categories therefore does not, by itself, capture every aspect of development.

Factors such as inequality, health, education, employment, infrastructure and access to essential services can differ substantially among countries within the same income group.

Likewise, a country moving into a higher income category represents an important economic milestone, but it does not automatically mean that every household has experienced the same improvement in living standards.

Why the Historical Comparison Matters

Comparing the maps across nearly 40 years offers a visual demonstration of how dramatically the global economic structure can change.

Countries can move upward when income growth outpaces the thresholds used for classification, while economic downturns, population changes and other factors can influence classifications in the opposite direction. The result is a constantly evolving map of the world economy.

The comparison from 1987 to 2025 therefore highlights both the progress made by many economies and the development gaps that continue to separate countries.

The graphic serves as a reminder that the global economy is not static. Economic fortunes change over time, and today’s classification can look very different from the picture seen a generation earlier.