How a single amendment transformed the definition of American citizenship

Cultures · Published 30 September 2026 Swipe more like this →

In short: In 1868, the United States ratified a legal revolution. Designed to secure the rights of formerly enslaved people against discriminatory state laws, the Fourteenth Amendment introduced birthright citizenship and equal protection, fundamentally shifting power from individual states to the federal government.

The Fourteenth Amendment emerged from the intense legislative battles of the Reconstruction era. Following the abolition of slavery via the Thirteenth Amendment, Southern states implemented 'Black Codes' between 1865 and 1866 to restrict the civil and labor rights of Black Americans. In response, Senator Lyman Trumbull introduced the first federal civil rights bill in early 1866, aiming to provide 'practical freedom' by ensuring the rights to contract, property, and legal recourse were federally protected.

The amendment's first section, primarily authored by Representative John Bingham, contains several critical clauses. The Citizenship Clause established that anyone born or naturalized in the U.S. is a citizen, effectively overturning the Supreme Court's 1857 Dred Scott decision. The Due Process and Equal Protection Clauses prohibit both federal and state governments from depriving individuals of life, liberty, or property without legal fairness, and require states to provide equal protection to all persons within their jurisdiction.

While some proponents, like Senator Jacob Howard, intended to nationalize the Bill of Rights, historians debate how widely this view was shared in Congress. For decades, the Supreme Court even ruled that the amendment failed to extend many Bill of Rights protections to the states. However, the amendment remains the most frequently litigated part of the Constitution, serving as the legal foundation for landmark decisions ranging from Brown v. Board of Education in 1954 to Obergefell v. Hodges in 2015.

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