The Fourteenth Amendment (1868) guarantees citizenship, due process, and equal protection of the laws against state governments, making it the constitutional engine behind selective incorporation, the civil rights movement, and landmark cases like Brown v. Board of Education.
The Fourteenth Amendment, ratified in 1868 after the Civil War, did something the original Constitution never did. It pointed individual rights protections directly at the states. The Bill of Rights originally limited only the national government, so a state could (and did) restrict speech, deny fair trials, or discriminate openly. The Fourteenth Amendment changed the math with two clauses you need cold for AP Gov. The Due Process Clause says no state may deprive any person of life, liberty, or property without due process of law. The Equal Protection Clause says no state may deny any person equal protection of the laws.
Those two clauses do almost all the work in Unit 3. The Due Process Clause is the vehicle for selective incorporation, the doctrine where the Supreme Court applies protections from the Bill of Rights to the states one at a time. The Equal Protection Clause is the foundation of civil rights law. It powered Brown v. Board of Education, the civil rights movement, the women's rights movement (think Reed v. Reed in 1971), and advocacy for LGBTQ rights. One amendment, two clauses, and a huge share of the AP Gov course flows through them.
The Fourteenth Amendment shows up in more CED topics than almost any other term in the course. In Unit 3, it anchors Topic 3.7 (LO 3.7.A, selective incorporation through the Due Process Clause), Topic 3.8 (LO 3.8.A, the Fourteenth Amendment's due process clause applies to states while the Fifth's applies to the national government), Topic 3.9 (LO 3.9.A, substantive due process and unenumerated rights like privacy), Topic 3.10 (LO 3.10.A, equal protection motivating social movements), and Topic 3.12 (LO 3.12.A, the Court restricting and then protecting minority rights). In Unit 1, it drives Topic 1.8 (LO 1.8.A), because the Due Process and Equal Protection Clauses give the national government power to enforce protections against the states, which shifted the balance of federalism toward Washington. If you can explain civil liberties, civil rights, and federalism, you can explain most of AP Gov, and the Fourteenth Amendment sits underneath all three.
Keep studying AP Gov Unit 3
Selective Incorporation (Unit 3)
Selective incorporation is the Fourteenth Amendment in action. The Court uses the Due Process Clause to apply Bill of Rights protections to the states case by case. McDonald v. Chicago (2010) is the required example, incorporating the Second Amendment right to bear arms against the states.
Equal Protection Clause (Unit 3)
The Equal Protection Clause is the half of the amendment that fuels civil rights. It is the constitutional basis for Brown v. Board striking down school segregation and the provision Dr. King invoked in 'Letter from a Birmingham Jail.' Later movements for women's rights and LGBTQ equality used the same clause.
Constitutional Interpretations of Federalism (Unit 1)
Every time the Court enforces the Fourteenth Amendment against a state, power shifts toward the national government. That is why LO 1.8.A lists the Due Process and Equal Protection Clauses alongside the Commerce Clause as tools that changed the federal-state balance over time.
Brown v. Board of Education (Unit 3)
Brown (1954) is the required case where the Equal Protection Clause overturned 'separate but equal' from Plessy. It is your best evidence for LO 3.12.A, the idea that the Court has restricted minority rights at some moments and protected them at others.
Multiple-choice questions love asking which amendment's Equal Protection Clause prohibits discrimination based on race, national origin, religion, and sex (answer: the Fourteenth), and which case declared school segregation unconstitutional under it (Brown v. Board). You may also see Reed v. Reed (1971), where the Court used equal protection to strike down an Idaho law discriminating by sex. On the free-response side, the Fourteenth Amendment is high-value evidence for the Argument Essay and SCOTUS comparison FRQ. A 2023 free-response prompt on whether the federal government or the states better ensure educational opportunity practically begs for the Equal Protection Clause and Brown as evidence. When you use it, name the specific clause. 'The Fourteenth Amendment' is okay, but 'the Equal Protection Clause of the Fourteenth Amendment' is the kind of precision that earns points.
Both amendments contain a Due Process Clause with nearly identical wording, and the exam tests whether you know the difference. The Fifth Amendment's due process clause restrains the national government. The Fourteenth Amendment's due process clause restrains the states. That is exactly why incorporation runs through the Fourteenth and not the Fifth. The Bill of Rights already bound the federal government, so the Court needed the Fourteenth to extend those protections to state governments.
The Fourteenth Amendment, ratified in 1868, prohibits states from denying any person due process of law or equal protection of the laws.
The Due Process Clause of the Fourteenth Amendment is the vehicle for selective incorporation, which applies Bill of Rights protections to the states one right at a time.
The Fifth Amendment's due process clause limits the national government, while the Fourteenth Amendment's due process clause limits the states.
The Equal Protection Clause supported and motivated the civil rights movement, the women's rights movement, and LGBTQ rights advocacy, and it was the basis for Brown v. Board of Education.
The Court has also used substantive due process under the Fourteenth Amendment to protect unenumerated rights, including the right to privacy.
Because it lets the national government enforce rights against the states, the Fourteenth Amendment shifted the balance of federalism toward the national government.
It is the 1868 amendment that guarantees citizenship and bars states from denying any person due process of law or equal protection of the laws. In short, it points rights protections at state governments, which the original Bill of Rights did not do.
No. The Court has incorporated rights selectively, one at a time, through the Due Process Clause rather than all at once. That is why the doctrine is called selective incorporation, and McDonald v. Chicago (2010) is the required example, incorporating the Second Amendment.
Both live in the Fourteenth Amendment but do different jobs. Due process protects life, liberty, and property from arbitrary state action (and carries incorporation), while equal protection prohibits states from discriminating based on characteristics like race, national origin, religion, and sex.
Both have a due process clause, but the Fifth Amendment's applies to the national government and the Fourteenth's applies to the states. The Fourteenth also adds the Equal Protection Clause, which the Fifth does not contain.
Brown v. Board of Education (1954) used the Equal Protection Clause to strike down school segregation, and McDonald v. Chicago (2010) used the Due Process Clause to incorporate the Second Amendment against the states. Reed v. Reed (1971), an equal protection case on sex discrimination, also shows up in practice questions.