We're told America is a "nation of immigrants" - that immigration has always been high and always will be. This is historically false.
For 40 years, from 1924 to 1965, America maintained the most restrictive immigration policy in its history. The result wasn't economic collapse. It was the greatest expansion of the middle class the world has ever seen.
The Great Pause: Immigration by the Numbers
Foreign-Born Population: 1920-1970
| Year | Foreign-Born | % of Population |
|---|---|---|
| 1920 | 13.9 million | 13.0% |
| 1930 | 14.2 million | 11.6% |
| 1940 | 11.6 million | 8.8% |
| 1950 | 10.3 million | 6.9% |
| 1960 | 9.7 million | 5.4% |
| 1970 | 9.6 million | 4.7% |
The foreign-born population fell by 31% - from 13.9 million to 9.6 million - while the total U.S. population nearly doubled. By 1970, just 4.7% of Americans were foreign-born, the lowest percentage in our nation's history.
Annual Immigration Quotas
| Period | Annual Quota |
|---|---|
| Pre-1921 | Unlimited |
| 1921-1924 | ~350,000 |
| 1924-1952 | ~165,000 |
| 1952-1965 | ~175,000 |
For four decades, America admitted fewer than 200,000 immigrants per year. Today, we admit over 1 million legally - and another 2-3 million illegally.
The Great Compression: When America Became Equal
Economists call the period from 1940 to 1970 the "Great Compression" - the only sustained period of declining income inequality in American history.
Income Share of Top 10%
| Year | Top 10% Share of Income |
|---|---|
| 1940 | 44% |
| 1945 | 32% |
| 1970 | 33% |
| 2020 | 50% |
The share of income going to the top 10% fell from 44% to 32% in just five years, and stayed compressed for three decades. Today, inequality has returned to pre-1940 levels.
What Caused the Compression?
Multiple factors contributed:
- Tight labor markets - Low immigration meant employers competed for workers
- Strong unions - By 1954, 33.5% of workers were unionized (vs. 10% today)
- Progressive taxation - High marginal rates on top earners
- War mobilization - Full employment during and after WWII
But the foundation of it all was a restricted labor supply. You cannot have strong unions or tight labor markets when millions of new workers arrive each year.
The Middle Class Miracle
Homeownership Explodes
| Year | Homeownership Rate |
|---|---|
| 1940 | 41% |
| 1950 | 55% |
| 1960 | 61% |
Homeownership jumped 20 percentage points in 20 years - the largest increase in American history. A working-class family could buy a home on a single income.
Real Income Doubles
Real family income roughly doubled from the late 1940s to the early 1970s - at all income levels. Incomes grew rapidly and at roughly the same rate up and down the income ladder.
The average family income grew as much in the 10 years after the war as it had in the previous 50 years combined.
Union Power Peaks
| Year | Union Membership |
|---|---|
| 1935 | 13% |
| 1945 | 35% |
| 1954 | 33.5% (Peak) |
| 1970 | 27% |
| 2024 | 10% |
Union density stayed above 30% every year from 1943 to 1961. With immigration restricted, workers had leverage. They could demand higher wages, better conditions, and job security - and get them.
Black Americans: The Greatest Beneficiaries
The immigration pause didn't just help white workers. It transformed the economic prospects of Black Americans.
Black Economic Progress: 1940-1970
| Metric | 1940 | 1970 | Change |
|---|---|---|---|
| Black/White wage ratio | 40¢/$1 | 70¢/$1 | +75% |
| Black families in poverty | 87% | 30% | -57 points |
| Black middle class | 20% | 70% | +50 points |
From 1940 to 1970 - largely paralleling the Great Pause in immigration - the average real earnings of white men rose by 210% and those of Black men rose by 406%.
By 1980, seven in ten Black Americans belonged to the middle class - up from just two in ten in 1940.
The Great Migration and Immigration Restriction
The connection is direct. When European immigration was cut off:
- Northern factories faced labor shortages - With no European immigrants arriving, employers looked elsewhere
- Black Southerners filled the gap - 5 million moved north between 1940 and 1970
- Wages rose for everyone - Tight labor markets meant employers had to pay more
Between 1920 and 1930, the decrease in immigrant labor had a strong positive impact on wages in manufacturing, as well as on the inflow of African Americans into these manufacturing jobs.
Immigration restriction didn't hurt Black Americans - it was the precondition for their greatest economic gains.
What Made It Work
1. Time for Assimilation
The 14 million immigrants already in America in 1920 had 40 years to assimilate without new arrivals overwhelming the process. Their children and grandchildren learned English, adopted American customs, and integrated fully.
2. Labor Market Power
With a restricted labor supply:
- Employers competed for workers (not workers for jobs)
- Unions could negotiate from strength
- Wages rose with productivity
- A high school diploma was enough for middle-class life
3. Shared Identity
By 1970, the various European immigrant groups - Irish, Italian, Polish, Jewish - had merged into a common American identity. The "hyphenated American" became simply "American."
The End of the Pause
The Immigration and Nationality Act of 1965 ended the Great Pause. Proponents promised it wouldn't change immigration levels.
Senator Ted Kennedy, floor manager of the bill:
> "Our cities will not be flooded with a million immigrants annually."
They were wrong - or lying.
What Happened Next
| Metric | 1970 | 2024 | Change |
|---|---|---|---|
| Foreign-born population | 9.6 million | 51+ million | +432% |
| Foreign-born % | 4.7% | 15.6% | +232% |
| Annual immigration | ~400,000 | 3+ million | +650% |
| Union membership | 27% | 10% | -63% |
| Top 10% income share | 33% | 50% | +52% |
Everything the Great Pause built has been undone. Inequality has returned to Gilded Age levels. Union membership has collapsed. The middle class has shrunk from 61% of adults in 1971 to 50% in 2021.
The Lessons
What the 1924-1965 Period Proves
- Low immigration is sustainable - America thrived for 40 years with minimal immigration
- Restriction benefits workers - Tight labor markets raise wages at all levels
- Assimilation requires time - You cannot assimilate millions while adding millions more
- The "nation of immigrants" myth is false - America has had long periods of low immigration
What We Must Do
Return to pre-1990 immigration levels at minimum - and ideally to pre-1965 levels:
| Policy | Current | Proposed |
|---|---|---|
| Legal immigration | 1+ million/year | 200,000/year |
| Illegal immigration | 2-3 million/year | Zero |
| H-1B visas | 85,000/year | Eliminated |
| Family chain migration | Unlimited | Nuclear family only |
The Choice Before Us
The 1924 Immigration Act wasn't perfect. Its national origins quotas reflected the prejudices of its era. But its core insight was correct: a nation must control its labor supply to protect its workers.
For 40 years, that policy created the American Dream - a country where a single income could support a family, buy a home, and send kids to college. Where Black Americans saw their wages quadruple. Where unions had power and workers had dignity.
We can have that again. But only if we're willing to learn from history instead of erasing it.
The Great Pause built the middle class. Mass immigration is destroying it.
Sources
Immigration Statistics
- Migration Policy Institute: Immigrant Population Over Time - Historical foreign-born population data 1850-present
- Pew Research Center: The Nation's Immigration Laws, 1920 to Today - Legislative history and quota levels
- Census Bureau: Historical Statistics on the Foreign-Born Population - Official census data 1850-1990
- Migration Policy Institute: A Century Later, the 1924 Immigration Law - Analysis of the 1924 Act's effects
Economic Research
- Princeton Economics: Effects of Immigration on the Economy - Lessons from the 1920s - Academic study of the 1920s border closure
- NBER: The Effects of Immigration on the Economy - National Bureau of Economic Research working paper
- Kansas City Fed: Immigration Restrictions and Wages of Low-Skilled Labor - Federal Reserve research
The Great Compression
- Kellogg Insight: Wage Inequality Decreased Dramatically in the 1940s - Analysis of the compression's causes
- Journalists Resource: Inequality, Labor Unions and the Great Compression - Role of unions in reducing inequality
Black Economic Progress
- PR Newswire: How the 1924 Immigration Act Helped Build the Black Middle Class - Analysis of immigration restriction and Black economic gains
- National Archives: The Great Migration (1910-1970) - Official history of Black migration
- ICPSR: Race, Economic Opportunity, and the Great Migration - Research on economic outcomes
Union Membership
- Congress.gov: A Brief Examination of Union Membership Data - Congressional Research Service report
- U.S. Treasury: Labor Unions and the U.S. Economy - Treasury Department analysis
Homeownership
- Census Bureau: Historical Homeownership Tables - Official homeownership rates by decade
- Federal Reserve: Homeownership in the Mid-Twentieth Century - Fed analysis of postwar homeownership boom
Image Credit
- Photo by Scott Graham on Unsplash