Recently, I’ve been looking at data on global national income rankings and noticed an interesting phenomenon. People often think the United States is the wealthiest country, but when looking at per capita GDP, the situation is actually quite different.

Luxembourg, Singapore, and Ireland—these small countries—are far ahead of the U.S. in per capita GDP. Luxembourg tops the list with a per capita GDP of $154,910, while the U.S. ranks 10th with $89,680. The gap seems quite significant.

I took a closer look at the common characteristics of these countries, and they are basically supported by a few core factors. Luxembourg, Switzerland, and Singapore mainly rely on finance and banking industries to accumulate wealth. Luxembourg, in particular, is known for its financial secrecy reputation, making it a popular place for companies and wealthy individuals to hide assets. On the other hand, countries like Qatar, Norway, and Brunei Darussalam have become wealthy through abundant oil and natural gas resources.

Singapore’s development path is especially worth noting. Despite its small size and population, it transformed from a developing country into a high-income economy in a short period through a business-friendly environment, low taxes, and efficient governance. It is now the second-largest container port in the world, and its political stability is among the best globally.

Ireland’s story is also quite inspiring. Its economy stagnated in the mid-20th century, but later, by opening markets, joining the European Union, and lowering corporate taxes, it attracted a large amount of foreign investment. It is now the fourth wealthiest country in the world, with a per capita GDP of $131,550.

Macau SAR ranks third, with a per capita GDP of $140,250, mainly supported by gambling and tourism industries. Norway, although now one of the wealthiest countries in Europe, was actually the poorest among the three Scandinavian countries historically. The discovery of oil changed everything.

However, one thing worth noting is that while per capita GDP can reflect the average income level, it ignores income inequality. The U.S. is a typical example—although it’s the world’s largest economy, it has the greatest income disparity among developed countries, with the gap between the rich and the poor constantly widening.

Looking at this global income ranking data, you’ll find that the factors behind economic success are quite diverse. Some countries rely on natural resources, some on financial innovation, and others on political stability and open policies. But regardless of the path, stable government, a highly skilled workforce, and a business-friendly environment seem to be essential foundational elements. This also explains why some small countries can occupy such an important position in the global economy.