Fourteenth Amendment in AP African American Studies

The Fourteenth Amendment (1868) is the Reconstruction Amendment that established birthright citizenship and guaranteed equal protection under the law, overturning Dred Scott v. Sandford and the Black codes, and later serving as the legal basis for Brown v. Board of Education.

Verified for the 2027 AP African American Studies examLast updated June 2026

What is the Fourteenth Amendment?

The Fourteenth Amendment, ratified in 1868, did two huge things. First, it defined birthright citizenship, meaning anyone born in the United States is a citizen. That single sentence erased the Dred Scott v. Sandford ruling (1857), which had declared that Black people could never be citizens. Second, it guaranteed equal protection of the laws to all people, which struck at the state-level Black codes that Southern states had passed to restrict the freedom, labor, and mobility of newly emancipated African Americans.

In AP African American Studies, the Fourteenth is the middle piece of the Reconstruction Amendments (Topic 3.1). The Thirteenth abolished slavery, the Fourteenth made formerly enslaved people citizens with equal rights, and the Fifteenth gave Black men the vote. Think of it as the amendment that answered the question "free, but free to be what?" The answer was a full citizen, entitled to the same legal protections as anyone else. Whether the federal government would actually enforce that promise is the story of Units 3 and 4.

Why the Fourteenth Amendment matters in AP® African American Studies

This term lives in two units, and that's exactly why it's so testable. In Unit 3 (Topic 3.1), it supports learning objective AP African American Studies 3.1.A, explaining how the Reconstruction Amendments defined standards of citizenship for free and formerly enslaved African Americans. In Unit 4 (Topic 4.4), it supports AP African American Studies 4.4.A and 4.4.B. The Civil Rights movement emerged from the need to force federal protection of the rights the Reconstruction Amendments already guaranteed on paper (EK 4.4.A.1), and Brown v. Board of Education (1954) ruled school segregation unconstitutional specifically because it violated the Fourteenth Amendment's equal protection clause (EK 4.4.B.1). So the Fourteenth Amendment is the legal thread connecting 1868 Reconstruction to the 1950s Civil Rights movement. Almost a century apart, same constitutional text.

How the Fourteenth Amendment connects across the course

Brown v. Board of Education (Unit 4)

Brown is the Fourteenth Amendment finally doing its job. In 1954 the Supreme Court ruled that state-sanctioned school segregation violated the equal protection clause, overturning Plessy v. Ferguson's 'separate but equal.' The Clarks' doll test gave the Court evidence that segregation itself caused harm, so 'separate' could never be 'equal.'

Dred Scott v. Sandford (Unit 2/3)

Dred Scott (1857) said Black people were not and could never be citizens. The Fourteenth Amendment is the direct constitutional reversal of that ruling. Exam questions love asking how the amendment changed the legal status of formerly enslaved people compared to Dred Scott, so know this pairing cold.

Civil Rights Act of 1875 (Unit 4)

This law outlawed racial discrimination in public places, building on the Fourteenth's equal protection promise. The CED frames the Civil Rights movement as the fight to get federal enforcement of both the Reconstruction Amendments and this act, since Jim Crow had hollowed them out in practice.

Fifteenth Amendment (Unit 3)

The Fourteenth made African Americans citizens; the Fifteenth gave Black men the vote, which let nearly 2,000 African Americans hold public office during Reconstruction. Together they show citizenship on paper and citizenship in practice, and both were rolled back during the Jim Crow era.

Is the Fourteenth Amendment on the AP® African American Studies exam?

The Fourteenth Amendment shows up two main ways. First, in Topic 3.1 questions asking what it did, usually in contrast with Dred Scott or the Black codes. Multiple-choice stems ask which part of the amendment challenged the Black codes' legal foundation (equal protection) or how birthright citizenship reversed Dred Scott. Second, in Topic 4.4 questions about Brown v. Board, where you need to explain that the Court used the equal protection clause to overturn Plessy v. Ferguson. The 2024 short-answer questions drew on this exact citizenship-and-rights material with a stimulus. The skill being tested isn't reciting 1868; it's connecting the amendment's text to a specific legal outcome. Be ready to explain WHY equal protection invalidated 'separate but equal,' not just that it did.

The Fourteenth Amendment vs Fifteenth Amendment

Easy to mix up because they're back-to-back Reconstruction Amendments. The Fourteenth (1868) is about citizenship and equal protection for all people. The Fifteenth (1870) is about voting rights for Black men specifically. Quick check for the exam: if the question mentions Brown v. Board, Black codes, or Dred Scott, it's the Fourteenth. If it mentions voting, Black officeholders, or political participation, it's the Fifteenth.

Key things to remember about the Fourteenth Amendment

  • The Fourteenth Amendment (1868) established birthright citizenship and equal protection under the law for all people.

  • It directly overturned Dred Scott v. Sandford, which had ruled that Black people could never be U.S. citizens.

  • Its equal protection clause undermined the legal foundation of the Black codes that Southern states used to restrict freedpeople.

  • In 1954, Brown v. Board of Education used the equal protection clause to rule school segregation unconstitutional and overturn Plessy v. Ferguson.

  • The Civil Rights movement emerged in part to force federal enforcement of the rights the Fourteenth Amendment guaranteed but Jim Crow denied.

  • It is the second of three Reconstruction Amendments, sitting between the Thirteenth (abolition) and the Fifteenth (Black men's voting rights).

Frequently asked questions about the Fourteenth Amendment

What did the Fourteenth Amendment do?

Ratified in 1868, it defined birthright citizenship (anyone born in the U.S. is a citizen) and guaranteed equal protection of the laws to all people. This overturned Dred Scott v. Sandford and undercut state Black codes.

Did the Fourteenth Amendment end segregation?

No. Plessy v. Ferguson (1896) let states segregate under 'separate but equal' despite the amendment. It took Brown v. Board of Education in 1954 for the Court to rule that segregated schools violated the equal protection clause, and even then de facto segregation persisted.

How is the Fourteenth Amendment different from the Fifteenth Amendment?

The Fourteenth (1868) covers citizenship and equal protection for all people; the Fifteenth (1870) gave Black men the right to vote. The Fourteenth is the basis for Brown v. Board, while the Fifteenth enabled the nearly 2,000 African Americans who held office during Reconstruction.

How did the Fourteenth Amendment overturn Dred Scott?

Dred Scott (1857) held that Black people were not citizens and had no rights the federal government had to respect. The Fourteenth Amendment's birthright citizenship clause erased that ruling by making everyone born in the U.S. a citizen, including formerly enslaved people.

Why does the Fourteenth Amendment matter for Brown v. Board of Education?

Brown ruled that state-sanctioned school segregation violated the Fourteenth Amendment's equal protection clause. The Court also cited Mamie and Kenneth Clark's doll test showing segregation damaged Black children's self-esteem, proving separate schools were inherently unequal.