AP United States History

## Learning Outcomes

- Explain why immigration restriction intensified after World War I
- Identify the main features of the Immigration Act of 1917, the Emergency Quota Act of 1921, and the Immigration Act of 1924
- Compare the quota formulas of **1921** and **1924**
- Understand how quota laws favored northern and western Europeans while restricting southern and eastern Europeans and excluding Asians
- Analyse how nativism, xenophobia, and the First Red Scare shaped federal immigration policy
- Use quota laws as evidence in APUSH causation, comparison, and continuity-and-change arguments

## AP United States History Syllabus

For the AP United States History, you are expected to understand quota laws and immigration restriction in the post-World War I period, with a focus on the following syllabus points:

- Know that the **Immigration Act of 1917** created a literacy test and the **Asiatic Barred Zone**
- Identify the **Emergency Quota Act of 1921** as the first major broad numerical immigration restriction by nationality
- Know that the **1921** law used **3% of each nationality’s foreign-born population in the United States based on the 1910 census**
- Know that the **Immigration Act of 1924** or **Johnson-Reed Act** used **2% based on the 1890 census**
- Explain why the **1890 census** favored immigrants from northern and western Europe over southern and eastern Europe
- Understand how the 1924 law excluded most Asian immigration through the “aliens ineligible for citizenship” provision
- Explain how postwar nativism, xenophobia, isolationism, and the First Red Scare encouraged restriction
- Understand that the **Western Hemisphere** was generally exempt from quota limits, which helped maintain migration from Mexico and other nearby regions

## Test Your Knowledge

_Attempt these questions before reading this article. If you find some difficult or cannot remember the answers, look more closely at that area during your revision._

1. What was the difference between the quota formulas in **1921** and **1924**?
2. Why did using the **1890 census** make the 1924 law more restrictive?
3. How did the First Red Scare help create support for immigration restriction?
4. Which groups were most harmed by the national origins quota system?
5. Why does the Western Hemisphere exemption complicate the idea that the United States simply “closed the door” in the 1920s?

## Introduction

Immigration restriction in the 1920s is one of the clearest examples of post-World War I reaction in the United States. It shows how wartime nationalism, anti-radical fear, and older racial prejudice moved from public mood into federal law. On the APUSH exam, these laws matter because they connect migration, politics, and national identity in Period 7.

This topic is also slightly tricky in framing. Although it appears under a World War I home-front heading, the quota laws were mainly **postwar** measures rather than wartime laws. That distinction matters. A strong answer explains how the war and Red Scare created the climate, then shows how Congress translated that climate into the restrictive laws of **1921** and **1924**.

> **Key Term: nativism**
> A belief that the interests of native-born Americans should be protected against immigrants, often leading to anti-immigrant politics and restriction.

### Background: restriction did not begin in 1921

The 1920s quota laws did not appear out of nowhere. They built on earlier federal restrictions, especially those aimed at Asians and poorer immigrants. That continuity is important because APUSH often rewards students who can show that the 1920s intensified existing trends rather than inventing them from scratch.

The **Immigration Act of 1917** was a major step. It required a **literacy test** and created the **Asiatic Barred Zone**, excluding immigration from much of Asia. This meant the federal government had already accepted the idea that it could sort immigrants by supposedly desirable and undesirable origins.

> **Key Term: Asiatic Barred Zone**
> A region defined by the Immigration Act of 1917 from which immigration to the United States was largely prohibited.

What changed in the 1920s was the scale and structure of restriction. Before then, the United States had often targeted particular groups. After World War I, Congress created a much broader system of numerical limits by nationality. That was a major shift from selective exclusion to a nationwide quota regime.

The social context also changed sharply. Between **1880 and 1910**, about **12 million** immigrants arrived, many from southern and eastern Europe. These “new immigrants” were often Catholic, Jewish, or Eastern Orthodox and were viewed by many native-born Americans as culturally different from earlier migrants from northern and western Europe. By the 1920s, many politicians argued that these newer arrivals threatened American “homogeneity.”

> **Key Term: xenophobia**
> Fear or hostility toward foreigners or immigrants.

This is where World War I matters. Wartime patriotism encouraged suspicion of anyone seen as insufficiently “American.” Anti-German feeling during the war broadened into a wider distrust of foreigners after the war. Then the **First Red Scare** linked immigration to radicalism, anarchism, and communism in the public mind, even when the connection was weak or false.

### The Emergency Quota Act of 1921: the first broad numerical limits

The **Emergency Quota Act of 1921** was the first major federal law to impose broad numerical limits by nationality. It did not merely inspect immigrants more strictly. It capped how many could enter.

Its formula is essential to memorise:

- annual quota = **3%**
- based on the number of **foreign-born persons of that nationality living in the United States in the 1910 census**

So if 100,000 foreign-born people from a certain country were living in the United States in 1910, the annual quota for that nationality would be 3,000.

This matters because the formula looked neutral but was not neutral in effect. By **1910**, many immigrants from southern and eastern Europe had already arrived in large numbers, so the law did allow some of them in. But it still sharply reduced overall immigration and marked a clear move away from the older, more open system.

> **Key Term: Emergency Quota Act of 1921**
> The first major federal law to impose broad numerical immigration limits by nationality, setting quotas at 3% of each nationality’s foreign-born population in the United States according to the 1910 census.

The act reflected several forces at once:

- fear that immigrants brought radical politics
- suspicion of labor unrest and anarchism
- postwar isolationism
- racial and ethnic prejudice

The law was called “emergency,” but the politics behind it were not temporary. It set the pattern for something more permanent.

> **Test Tip:** For APUSH multiple-choice, watch for the distinction between earlier restrictions and 1920s quotas. If the question asks for the first broad numerical limit by nationality, the answer is usually the **Emergency Quota Act of 1921**.

### The Immigration Act of 1924: harsher, more deliberate, more permanent

The **Immigration Act of 1924**, also called the **Johnson-Reed Act**, made restriction much stricter. It changed the formula from **3% of the 1910 census** to **2% of the 1890 census**.

That one change tells you almost everything about the law’s intent.

> **Key Term: Immigration Act of 1924**
> Also called the Johnson-Reed Act, a law that reduced immigration quotas to 2% of each nationality’s U.S. population based on the 1890 census and hardened the national origins quota system.

Why did the **1890 census** matter so much? Because before 1890, the largest immigrant groups in the United States were more heavily from northern and western Europe. The large waves from Italy, Poland, Russia, and other parts of southern and eastern Europe mostly came later. So by choosing **1890** instead of **1910**, Congress used an older population snapshot that favored earlier immigrant groups and cut down later ones.

That was not accidental. It was a way to engineer the ethnic makeup of future immigration.

A comparison makes this clearer:

- **1921**: 3% of 1910
- **1924**: 2% of 1890

The 1924 law was more restrictive in two ways:

- the percentage dropped from 3 to 2
- the baseline moved to an earlier census that included fewer southern and eastern Europeans
  > **Key Term: national origins quota system**
  > An immigration system that assigned entry quotas by nationality in ways designed to favor some national and ethnic groups over others.

This is why APUSH questions often frame the 1924 act as an example of nativism and racial hierarchy. The point was not simply to reduce immigration overall. The point was to reduce some immigrants much more than others.

Congressional resistance was limited. That itself is historically significant. It shows how normal anti-immigrant politics had become by the mid-1920s.

### Why the laws targeted some groups more than others

Students often know that the laws were restrictive, but miss how selective they were. The quota system did not reduce all groups equally. It favored northern and western Europeans and hit southern and eastern Europeans much harder.

That selective design reflected several assumptions:

- that older immigrant groups were more “American”
- that southern and eastern Europeans were politically radical
- that Catholic, Jewish, and Slavic immigrants were less assimilable
- that the United States should preserve an existing racial and cultural order

The law also targeted Asians even more bluntly. The **1924 act** excluded immigration by **“aliens ineligible for citizenship.”** Because existing naturalization law prevented most Asian immigrants from becoming citizens, this provision effectively barred most Asian immigration, including Japanese immigration.

> **Key Term: aliens ineligible for citizenship**
> A legal category used to exclude immigrants, especially Asians, from entering the United States because existing law denied them eligibility for naturalization.

This shows an important continuity. Anti-Asian exclusion did not begin in 1924. It had deeper roots in earlier restriction. But 1924 strengthened and widened that exclusion within a national quota framework.

A strong APUSH answer can make this distinction:

- **continuity**: anti-Asian exclusion already existed
- **change**: new nationwide numerical quotas now restricted Europeans by ethnic origin too
  > **Test Tip:** If a question asks how the 1924 law differed from earlier policy, a strong answer is: it continued anti-Asian exclusion but added a broader national-origins quota system that sharply reduced immigration from southern and eastern Europe.

### The Red Scare, labor fear, and postwar politics

The quota laws make the most sense when placed in the political climate after World War I. Americans did not suddenly fear all immigrants for one single reason. Several fears merged.

First, wartime patriotism encouraged demands for “100 percent Americanism.” That idea made difference itself seem suspicious. Language, religion, food, dress, and political ideas could all become evidence of disloyalty.

Second, the **First Red Scare** made many Americans associate immigrants with anarchism, socialism, and communism. The Russian Revolution of **1917** intensified this. If Bolshevism had overthrown the old order in Russia, some Americans feared radicalism might spread in the United States too.

Third, labor unrest after the war deepened elite anxiety. Strikes and union activism were often linked, fairly or unfairly, to foreign radicals. Because many workers in industrial cities were immigrants or children of immigrants, anti-labor feeling and anti-immigrant feeling often reinforced each other.

The **Sacco and Vanzetti** case became a symbol of this mood. Two Italian immigrant anarchists were tried and executed in a climate shaped by fear of radicals and foreigners. Whether or not students use that case in an essay, they should understand what it represents: immigrants could be cast as dangerous not just because they were foreign, but because they were assumed to carry alien political ideas.

The revival of the **Ku Klux Klan** in the 1920s fits into the same story. This newer Klan targeted not only Black Americans, but also Catholics, Jews, and immigrants. That shows how immigration restriction belonged to a broader culture war over who counted as truly American.

### The Western Hemisphere exception: a key complication

A top-band answer should not stop at “America closed the door.” That is too simple. The quota system generally did **not** apply to the **Western Hemisphere**. Immigration from Mexico, Canada, the Caribbean, Central America, and South America was treated differently.

Why? Labor demand.

U.S. employers, especially in agriculture and railroads, still wanted workers from Mexico and nearby regions. So while Congress restricted many Europeans and excluded Asians, it left an opening where employers wanted cheap labor.

This is one of the most useful complexities in the topic. It shows that immigration policy was shaped not only by prejudice, but also by economic need. Restriction was selective because employers, voters, and politicians wanted different things from different groups.

The same contradiction helps explain the creation of the **U.S. Border Patrol** in **1924**. Migration from Mexico could continue because the hemisphere was exempt from quotas, but the federal government also wanted greater control and policing of movement.

So the policy message was mixed:

- labor from the Western Hemisphere was useful
- migration still had to be watched and controlled

This is classic APUSH material because it combines economics, migration, and politics in one example.

### How to use this topic in SAQs, LEQs, and DBQs

For an **SAQ**, the most common structure is:

- one cause
- one policy detail
- one consequence

For example:

- cause: postwar nativism and Red Scare fears
- policy detail: 1924 set quotas at 2% based on the 1890 census
- consequence: reduced immigration from southern and eastern Europe while favoring northern and western Europeans

For an **LEQ** or **DBQ**, strong arguments often use one of these lines:

- quota laws were a product of postwar fear and conservative reaction
- quota laws reflected racial hierarchy in federal policy
- the 1920s brought change through national quotas but continuity through anti-Asian exclusion
- immigration policy was restrictive, but not uniformly so, because the Western Hemisphere remained largely exempt

A good thesis usually combines cause and consequence. For example: postwar nativism and the First Red Scare pushed Congress to adopt the quota laws of 1921 and 1924, which sharply reduced immigration and favored northern and western Europeans while excluding Asians and limiting newer immigrant groups from southern and eastern Europe.

## Key Point Checklist

_This article has covered the following key knowledge points:_

- The quota laws of the 1920s are best understood as a post-World War I domestic reaction rather than wartime policy itself
- The Immigration Act of 1917 created a literacy test and the Asiatic Barred Zone
- The Emergency Quota Act of 1921 was the first major broad numerical immigration restriction by nationality
- The 1921 law used a quota formula of 3% based on the 1910 census
- The Immigration Act of 1924 or Johnson-Reed Act reduced quotas to 2% based on the 1890 census
- Using the 1890 census favored immigrants from northern and western Europe
- The 1924 law sharply reduced immigration from southern and eastern Europe
- The 1924 law excluded most Asian immigration through the “aliens ineligible for citizenship” provision
- Nativism, xenophobia, isolationism, and the First Red Scare all helped create support for restriction
- The quota system generally exempted the Western Hemisphere, helping sustain migration from Mexico and nearby regions
- The 1920s laws show both continuity with earlier anti-Asian exclusion and change through nationwide numerical quotas
- These laws remained influential until the national origins system was ended in 1965

## Key Terms and Concepts

- nativism
- Asiatic Barred Zone
- xenophobia
- Emergency Quota Act of 1921
- Immigration Act of 1924
- national origins quota system
- aliens ineligible for citizenship


World War I: Home Front - Quota laws and immigration restriction