The Constitutional
Amendments, 11 to 27
After the Bill of Rights came 17 more amendments, abolishing slavery, expanding voting rights, creating the income tax, banning alcohol, and fixing the Constitution's flaws one at a time. Here's every one explained in plain English.
How the Constitution Gets Updated
The founders knew they couldn't get everything right. They built in a way to fix mistakes, adapt to new circumstances, and expand rights over time, the amendment process. But they made it deliberately difficult, so the Constitution couldn't be changed on a political whim.
The Bill of Rights (Amendments 1-10) was ratified all at once in 1791. After that, amendments have come one at a time, each one a hard-fought battle reflecting a crisis, a social movement, or a fundamental flaw in the original design. Seventeen more have been added in the 234 years since.
"The Congress, whenever two thirds of both Houses shall deem it necessary, shall propose Amendments to this Constitution, or, on the Application of the Legislatures of two thirds of the several States, shall call a Convention for proposing Amendments, which, in either Case, shall be valid to all Intents and Purposes, as Part of this Constitution, when ratified by the Legislatures of three fourths of the several States, or by Conventions in three fourths thereof..."
In plain English: To add an amendment, you need two-thirds of both the House and Senate to propose it (or two-thirds of state legislatures to call a convention). Then three-fourths of all states, currently 38 of 50, must ratify it. It's a very high bar. Only 27 amendments have made it through in over 230 years.
The Amendments by Era
The amendments didn't come evenly, they came in waves, each one triggered by a national crisis or social movement:
Early Republic (11–12, 1795–1804)
Fixing the Constitution's early flaws, limiting state immunity from lawsuits and fixing the broken Electoral College process that nearly destroyed the young republic.
Civil War Era (13–15, 1865–1870)
The Reconstruction Amendments, abolishing slavery, establishing birthright citizenship and equal protection, and guaranteeing voting rights regardless of race. The most transformative amendments ever ratified.
Progressive Era (16–19, 1913–1920)
A burst of reform: income tax, direct election of senators, the ill-fated Prohibition, and women's suffrage. Four amendments in eight years during America's greatest period of political reform.
New Deal Era (20–22, 1933–1951)
Modernizing the government: fixing the lame duck problem, repealing Prohibition's disaster, and limiting presidential terms after FDR's unprecedented four elections.
Civil Rights Era (23–26, 1961–1971)
Expanding democracy: giving DC a presidential vote, banning poll taxes, clarifying presidential succession, and lowering the voting age to 18 amid Vietnam War protests.
Modern (27, 1992)
The 27th Amendment, originally proposed by James Madison in 1789, was finally ratified 202 years later thanks to a determined college student. Congressional pay raises must wait for the next election.
Amendments 11 Through 27, Fully Explained
Click any amendment to expand the full explanation, historical context, real-world impact, and current debates.
Notable Amendments That Never Made It
For every amendment that passed, others were proposed and failed. Some of the most revealing, and chilling, are the ones that never made it:
Quick Reference
Did You Know?
The Constitution was almost amended to protect slavery forever
In March 1861, just before the Civil War, Congress passed the Corwin Amendment, which would have made slavery permanently protected from federal interference. Lincoln didn't oppose it. Three states ratified it before the war made it irrelevant. It's never been formally rejected, technically still 'pending' ratification, though obviously unenforceable.
One amendment was ratified faster than any other
The 26th Amendment, lowering the voting age to 18, was ratified in just 100 days after Congress passed it in 1971. States rushed to ratify because there were already two voter registration systems in place (one for federal elections where 18-year-olds could vote, one for state elections where they couldn't) and the administrative chaos was unworkable.
The 18th Amendment is the only one ever repealed
Of the 27 amendments ever ratified, only one has been struck down by a later amendment. Prohibition (18th) was repealed by the 21st, making alcohol constitutional again in 1933. It remains the most dramatic reversal in constitutional history and a cautionary tale about using the Constitution for social engineering.
Congress tried to give itself an immediate raise, once
The 27th Amendment only exists because Madison anticipated exactly this problem in 1789. Members of the First Congress were already talking about pay raises. Madison specifically wrote this amendment to prevent immediate self-enrichment. It sat dormant for 203 years before becoming law, proof that constitutional provisions don't expire.