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Income and Wealth Gaps in the US Over Time

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After World War II (“Great Compression”)

From the 1940s to the 1970s, the United States had much lower inequality than today. Historians call this time the “Great Compression” because wages became more equal for most workers. Unions were strong, the government taxed the rich at very high rates, and public investments like schools and highways helped many families. Economists Claudia Goldin and Robert Margo explain how wages became more equal during this period: link to their study.

Changes in the 1980s

Around 1980, US policies shifted. Taxes on the rich were cut, rules on businesses were loosened, and worker protections weakened. This idea was called “trickle-down economics.” Instead of helping everyone, it mostly benefited the wealthy. For example, the top tax rate on the richest Americans fell from more than 90% in the 1960s to around 35% by the 2000s (Tax Policy Center).

Today’s Wealth Divide

Now, the gap between rich and poor in the US is very wide. By 2021, the top 1% of families owned about 31% of all wealth, while the bottom 50% owned only about 2–3%. You can see this in the Federal Reserve’s wealth data. In contrast, in 1980, the top 1% owned under 10% of the nation’s income (World Inequality Database).

How the US Compares to Other Countries

Compared to other rich countries, the United States is now one of the most unequal. Many European countries, like France and Germany, and especially Nordic countries (Sweden, Norway, Denmark), use stronger social programs and progressive taxes to keep inequality lower. The Gini index is a number that measures inequality: 0 means total equality, 1 means total inequality. The US has a Gini index above 0.41, while countries like Germany or Sweden are closer to 0.25–0.30 (OECD Data).

Key Points

  • 1940s–1970s: Low inequality thanks to unions, high taxes on the rich, and public investments (Goldin & Margo).
  • 1980s onward: Trickle-down policies cut taxes for the rich and weakened labor protections (Tax Policy Center).
  • Today: The richest 1% own about one-third of all wealth; the bottom half own almost nothing (Federal Reserve).
  • Global comparison: The US is now among the most unequal advanced countries, with a much higher Gini index than Europe or the Nordics (OECD Data).

Glossary of Key Terms

  • Union: A group of workers who join together to fight for better pay and working conditions.
  • Progressive taxes: A tax system where richer people pay a higher percentage of their income than poorer people.
  • Trickle-down economics: The idea that if the government helps the rich (with tax cuts), the benefits will “trickle down” to everyone else. Critics say it mostly helps the wealthy.
  • Wealth: All the things a person owns—like houses, savings, or stocks—minus what they owe.
  • Gini index: A number that shows how unequal incomes are in a country. Zero means that everyone has the same amount and 1 means that one person has all the wealth.

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