Grade Levels: Middle School, High School
Subject Areas: Social Studies, U.S. History
Questions: How have claims of “science” been used to justify exclusion? How did ideas about racial hierarchy shape immigration policy?
By Erin Suh
Overview
Today, we often think of European immigrants as having been welcomed into American society. Those assumptions are, in part, based on beliefs, often subconscious, about race. However, in the late 19th and early 20th centuries, the boundaries of whiteness were fiercely contested—and immigrants from southern and eastern Europe were frequently cast as racially inferior and unfit for American citizenship.
The Immigration Restriction League, founded in 1894, helped construct and spread these ideas. Using the pseudo-science of eugenics, the League argued that certain groups were biologically unsuited for democracy. Their campaigns shaped decades of immigration policy, culminating in literacy tests and, eventually, the restrictive quota systems of the 1920s.
This lesson examines primary sources from the League’s advocacy efforts to understand how racial categories were constructed, how “science” was weaponized to justify exclusion, and how these ideas shaped who could become American.
Historical Context
Between 1880 and 1920, approximately 20 million immigrants arrived in the United States—more than in any previous period. Many came from southern and eastern Europe: Italians, Poles, Russian Jews, Greeks, and others fleeing poverty, persecution, and limited opportunity.
Their arrival alarmed many native-born Americans, particularly those of northern European descent. Critics claimed these “new immigrants” were racially distinct from—and inferior to—earlier arrivals from Britain, Germany, and Scandinavia. They worried these newcomers could not assimilate, would depress wages, and would pollute the nation’s racial stock.
Into this climate stepped the Immigration Restriction League. Founded by three Harvard graduates—Prescott Farnsworth Hall, Charles Warren, and Robert DeCourcy Ward—the League brought intellectual respectability to nativist politics. They gathered data, published research, and lobbied Congress relentlessly.
Their preferred tool was the literacy test: a requirement that immigrants demonstrate the ability to read. This seemed race-neutral on its surface, but the League knew exactly what it would accomplish. Immigrants from southern and eastern Europe, who often came from regions with limited access to formal education, would be disproportionately excluded.
Congress passed literacy test legislation multiple times, only to see it vetoed by Presidents Cleveland, Taft, and Wilson. But the League persisted. In 1917, Congress finally overrode Wilson’s veto, and the literacy test became law.
The Sources
The documents below come from the Immigration Restriction League’s records. They are responses to a survey the League sent to organizations across the country—many of them state Granges (agricultural associations)—asking which immigrants they wanted and which they wished to exclude.


To view additional sources, follow this link.
The responses reveal the racial thinking of the era. “Desired” immigrants included native-born Americans, northern Europeans, skilled workers, and families. “Undesired” immigrants included southern and eastern Europeans, “Asiatics,” and those deemed illiterate.
These categories were not natural or inevitable. They were constructed—built through decades of pseudo-scientific argument and political organizing.
Key Vocabulary
Eugenics: A pseudo-science claiming that human populations could be “improved” through selective breeding. Eugenicists ranked racial and ethnic groups in hierarchies and advocated policies—including immigration restriction, forced sterilization, and marriage prohibitions—to limit reproduction by those deemed “unfit.” These ideas were later embraced by Nazi Germany.
Nativism: Policies and attitudes favoring native-born inhabitants over immigrants. In the U.S. context, nativism has typically meant favoring white Protestant Americans of northern European descent.
Pseudo-science: Claims presented as scientific that lack the evidence, methodology, or rigor of actual science. Eugenics is a prime example—it dressed prejudice in the language of biology.
Literacy test: A requirement that immigrants demonstrate reading ability before being admitted to the United States. Though framed as a neutral measure of fitness, literacy tests were designed to exclude specific groups.
Discussion Questions
Analyzing the Sources
Understanding the Ideology
Connecting to Larger Patterns
Extension Activities
For Middle School:
For High School:
Primary Source Set
These documents offer further examples of how organizations across the country categorized immigrants. Consider:
For Educators
This lesson addresses the constructed nature of racial categories—an essential concept for understanding both historical and contemporary debates about immigration. Students may be surprised to learn that groups now considered unambiguously “white” were once targets of racialized exclusion.
Some key teaching considerations:
On eugenics: Students need to understand that eugenics was not fringe—it was mainstream science taught at major universities and embraced by prominent figures. This history helps students think critically about how “science” can be shaped by social prejudice and how ideas gain legitimacy through institutional support.
On the construction of whiteness: The boundaries of whiteness have shifted dramatically over American history. Irish, Italian, Jewish, and Slavic immigrants were all, at various points, considered racially distinct from and inferior to Anglo-Saxon Americans. Understanding this history helps students see race as a social and political construction rather than a fixed biological reality.
On connecting past and present: Students may draw connections to contemporary immigration debates. Encourage careful analysis rather than simple equivalence—contexts differ, but patterns of argument often recur.
Resources for Further Learning
Facing History and Ourselves, “Race and Membership in American History: The Eugenics Movement”: https://www.facinghistory.org/resource-library/race-membership-american-history-eugenics-movement See more of the filled out forms here.
Mae Ngai, Impossible Subjects: Illegal Aliens and the Making of Modern America (2004)
Matthew Frye Jacobson, Whiteness of a Different Color: European Immigrants and the Alchemy of Race (1998)
Daniel Okrent, The Guarded Gate: Bigotry, Eugenics, and the Law That Kept Two Generations of Jews, Italians, and Other European Immigrants Out of America (2019)