How Constitutional Amendments Work and Why They Are So Rare

The Most Difficult Lawmaking Process in American Government

The United States Constitution has been amended 27 times since its ratification in 1788. That figure is remarkable not for its size but for its smallness. In 235 years, through a civil war, two world wars, the industrial revolution, the digital age, and dozens of profound social transformations, the foundational legal document of the United States has changed formally only 27 times — the last time in 1992, when the 27th Amendment, ratified 202 years after its original proposal in 1789, finally prohibited mid-term congressional pay raises. The rarity of amendments is not accidental; it reflects a deliberately designed process of supermajority requirements that makes constitutional change structurally difficult in a way few other democracies have replicated.

Article V: The Amendment Mechanism

Article V of the Constitution provides two paths to proposal and two paths to ratification, creating four possible routes to amendment — though in practice only one has ever been used.

The two-thirds/three-fourths threshold means that a constitutional amendment cannot succeed if 34 senators, 146 House members, or 13 state legislatures oppose it — regardless of how large the majority in favor may be. This supermajority requirement ensures that amendments reflect broad national consensus rather than temporary political majorities, but it also means that widely supported changes can fail for decades.

The Bill of Rights: Amendments Born From a Political Compromise

The first ten amendments — the Bill of Rights — were not included in the original Constitution because the Framers were divided on whether explicit enumeration of rights was desirable. Federalists like Hamilton argued in Federalist No. 84 that listing rights was dangerous: it implied that rights not listed were not protected. Anti-Federalists insisted that without enumerated rights, the federal government could not be trusted to respect them. The compromise that secured ratification of the Constitution in several states was a promise to add a Bill of Rights once the new government was established.

James Madison drafted the amendments in the First Congress (1789), drawing heavily from state declarations of rights and the nearly 200 amendments proposed by state ratifying conventions. Congress approved 12 amendments; 10 were ratified by 1791. The two that failed at the time concerned congressional apportionment and congressional pay — the latter of which would eventually become the 27th Amendment two centuries later.

The Reconstruction Amendments: Constitutional Revolution After the Civil War

The 13th, 14th, and 15th Amendments, passed between 1865 and 1870, constitute the most significant expansion of constitutional rights in American history. They abolished slavery, established birthright citizenship and equal protection of the laws, and prohibited denial of voting rights based on race. They also represented an unprecedented transfer of power from states to the federal government, which gained authority to enforce their provisions through appropriate legislation.

• The ratification of the 14th Amendment was coerced: Southern states were required to ratify it as a condition of readmission to the Union after the Civil War. Whether this was constitutionally proper was disputed at the time and remains a subject of academic debate, though the Amendment's legitimacy as settled constitutional law is not in question.
• The 14th Amendment's Equal Protection Clause became the textual basis for the 20th century's most consequential civil rights decisions, including Brown v. Board of Education (1954) and Loving v. Virginia (1967).

Failed Amendments and Near-Misses

For every ratified amendment there are dozens that have failed at proposal or ratification. Congress has approved amendments that were never ratified by the states, and the question of whether they remain perpetually available for ratification is unsettled — the 27th Amendment's peculiar ratification history highlighted this ambiguity.

The 27th Amendment: A 202-Year Odyssey

The 27th Amendment, which provides that no law varying congressional compensation shall take effect until an intervening election occurs, was proposed by James Madison as part of the original Bill of Rights in 1789 and initially ratified by only six states. It then sat dormant for 192 years until Gregory Watson, a University of Texas undergraduate, discovered it in 1982 while researching a paper on the amendment process. Watson began a letter-writing campaign to state legislatures, arguing that Madison's amendment had no ratification deadline and remained available. States began ratifying it; by 1992, the 38th state had ratified, and the National Archivist certified it as the 27th Amendment — making Watson's C+ paper the seed of a constitutional amendment.

Comparing Amendment Difficulty Across Democracies

The American amendment process is among the most difficult in the world. Germany's Basic Law can be amended by two-thirds of the Bundestag and two-thirds of the Bundesrat, with some provisions explicitly unamendable (the eternity clauses protecting human dignity and democracy). France's Fifth Republic constitution has been amended 24 times since 1958 — more frequently than the U.S. Constitution despite being 200 years younger. Australia requires a double majority: a national majority and a majority in four of six states — a threshold that has defeated many popular reform proposals, including repeated attempts to become a republic.

• The United Kingdom has no codified constitution and can amend its constitutional arrangements through ordinary parliamentary statute — a flexibility that allows rapid constitutional adaptation at the cost of predictability and entrenchment of rights.
• India's Constitution, adopted in 1950, has been formally amended over 100 times, reflecting a much more frequently used amendment process. India's Supreme Court has developed the basic structure doctrine to limit constitutional amendments that would destroy the constitution's essential features, creating an unwritten analog to Germany's eternity clauses.

This article is for informational purposes only and does not constitute legal advice.