Birthright citizenship is one of the most defining principles of American identity. It guarantees that almost every child born on U.S. soil becomes a citizen, no matter their parents’ immigration status. To understand why the US has birthright citizenship, we must explore the constitutional foundations, historical context, and enduring purpose of this uniquely American system.
1. The Historical Roots of Birthright Citizenship
1.1 English Common Law Influence
The principle behind why the US has birthright citizenship can be traced to English common law. Under this system:
- Anyone born within the territory automatically became a subject.
- Parental citizenship did not matter.
- Only children of diplomats or invading forces were excluded.
This jus soli (right of the soil) tradition was adopted by the American colonies and carried into early U.S. practice.
1.2 Citizenship in Early America Before the Civil War
Before the Fourteenth Amendment, the Constitution did not define citizenship. States had their own rules, resulting in:
- Free Black residents being citizens in some states but not others
- Enslaved people considered property
- Native Americans largely excluded
- Immigrant children treated inconsistently
This lack of a uniform national citizenship standard eventually led to legal and social chaos.
1.3 The Dred Scott Case: The Breaking Point
The 1857 Dred Scott v. Sandford decision declared that:
- Black people, free or enslaved, could never be United States citizens
- Congress could not grant citizenship to them
This shocking ruling intensified national tensions and exposed the need for a constitutional definition of citizenship.
This crisis directly shaped why the US has birthright citizenship today.
2. The Civil War and the Birth of Constitutional Citizenship
2.1 Reconstruction Created a Need for a New Citizenship Standard
After the Civil War, millions of freed slaves needed permanent legal status. Without guaranteed citizenship:
- States could strip away their rights
- Former Confederates could recreate racial hierarchies
- Courts could replicate the logic of Dred Scott
A national definition of citizenship became urgent.
2.2 The Citizenship Clause of the Fourteenth Amendment
Ratified in 1868, the Fourteenth Amendment states:
“All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens…”
This clause established why the US has birthright citizenship:
- It ensured freed slaves were citizens
- Prevented states from excluding racial groups
- Provided uniform citizenship nationwide
- Guaranteed equal protection under the law
The framers wanted citizenship to be broad, clear, and not subject to political manipulation.

2.3 Why Congress Chose Birthplace Over Bloodline
Congress debated between:
- Jus soli (citizenship by birthplace)
- Jus sanguinis (citizenship by parental bloodline)
Birthright citizenship was chosen because it:
- Followed long-standing American tradition
- Prevented racial discrimination
- Ensured children of immigrants were fully included
- Avoided creating second-class populations
This decision explains why the US has birthright citizenship instead of requiring parental citizenship.
3. Supreme Court Cases That Solidified Birthright Citizenship
3.1 United States v. Wong Kim Ark (1898)
The Supreme Court ruled that Wong Kim Ark—born in the U.S. to Chinese immigrant parents—was a citizen. The Court confirmed:
- The Fourteenth Amendment guarantees birthright citizenship
- Immigration status of parents does not matter
- Only children of diplomats or hostile invaders are excluded
This landmark case cemented the modern understanding of why the US has birthright citizenship.
3.2 Modern Court Reaffirmations
Federal courts have repeatedly held that:
- Birthright citizenship cannot be revoked by Congress
- Children of undocumented immigrants are included
- The meaning of the Citizenship Clause is clear and settled
The judiciary consistently upholds birthright citizenship as a core constitutional principle.
4. The Philosophical Foundations of Birthright Citizenship
4.1 American Ideals of Equality
Birthright citizenship reflects fundamental American beliefs:
- Equality before the law
- No inherited social classes
- Individual rights from birth
- A rejection of aristocratic privilege
This aligns closely with why the US has birthright citizenship in the first place: to ensure equal membership in society.
4.2 Rejecting Old-World Hierarchies
Many European systems historically tied citizenship to ancestry, which:
- Preserved ethnic homogeneity
- Excluded minority groups
- Maintained inherited privilege
The U.S. deliberately chose a different path, making citizenship inclusive rather than exclusive.
5. Practical and Economic Benefits of Birthright Citizenship
5.1 Administrative Clarity
Birthright citizenship:
- Reduces bureaucracy
- Ensures immediate legal clarity
- Prevents disputes over parental status
It avoids the paperwork-heavy complexities seen in countries without it.
5.2 National Social Stability
Without birthright citizenship, the U.S. could face:
- Millions of stateless people
- A permanent non-citizen underclass
- Greater social inequality
- Reduced national unity
Birthright citizenship helps maintain social cohesion.
5.3 Supporting Immigration and Economic Growth
Immigrants have always been a major force in America. Birthright citizenship:
- Encourages integration
- Strengthens workforce participation
- Promotes long-term economic investment
- Avoids intergenerational disenfranchisement
This economic logic is a significant part of why the US has birthright citizenship today.
6. Preventing a Permanent Underclass
Countries that deny birthright citizenship often produce generations of non-citizens. This results in:
- Stateless children
- Marginalized communities
- Social instability
- Long-term ethnic divisions
The U.S., after witnessing the horrors of slavery and racial exclusion, chose a system that prevents such outcomes.
7. Modern Debates and Misunderstandings
7.1 Birth Tourism Concerns
Although birth tourism exists, it represents a tiny fraction of births and does not undermine the constitutional framework.
7.2 Misconception: “Other countries don’t have it”
Many nations, especially across the Americas, still use birthright citizenship. The U.S. preserved it because it aligns with constitutional values and ensures social equality.
8. Why Birthright Citizenship Continues Today
Birthright citizenship remains because:
- It is constitutionally protected
- It prevents discrimination
- It promotes unity
- It supports the economy
- It avoids legal chaos
- It reflects American ideals
Changing it would require amending the Constitution—a massive and unlikely undertaking.

Conclusion
The question of why the US has birthright citizenship leads back to the nation’s most defining struggles: slavery, civil war, racial inequality, and the need for a unified rule of citizenship. Birthright citizenship embodies the belief that everyone born on American soil deserves full membership in the nation.
It remains a powerful expression of American identity and constitutional equality.