The US Constitution has been amended 27 different times since its ratification

The Constitution is difficult to amend

Amended just 27 times in more than 230 years, the US Constitution is deliberately hard to change. This animated video from TED-Ed explains why the amendment process is so complex and what that rigidity means in practice.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

The US Constitution has influenced rights and governments worldwide

This interactive tool from the National Constitution Center allows you to compare constitutional rights globally, highlighting which countries have adopted protections similar to those in the US Constitution—and how shared principles manifest in different legal forms around the world.

Read through the actual text of the US Constitution

This helpful guide from the US Congress includes annotations that provide valuable insights into the background, crafting, and legacy of each article in the document. Additionally, the resource offers accessible legal analysis and interpretations.

Debating the Constitution today

The Constitution continues to shape our political and social life today. If you want to understand how today’s political debates connect to the Constitution, check out this podcast from the National Constitution Center. The weekly program features experts from diverse perspectives and explores how constitutional principles shape modern issues.

Amending the Constitution requires broad support

The framers created a demanding amendment process. Proposed changes require two-thirds approval in both houses of Congress and ratification by three-fourths of the state legislatures, making sure that constitutional amendments reflect a broad national consensus rather than temporary political majorities.

The Constitution included compromises that still shape the US today

The creation of the Constitution necessitated numerous compromises to accommodate the diverse interests of the states. The significant compromises included resolutions on debates over representation in Congress and the status of enslaved individuals.

Thousands of constitutional amendments have failed

Of nearly 12,000 proposed constitutional amendments, only 27 were ratified. This article highlights radical failed proposals that would have renamed the country, abolished the presidency, capped personal wealth, or fundamentally rewritten how American democracy works.

Hear about the individuals who have reshaped the Constitution throughout American history

This multi-episode podcast series from The Washington Post explores how debates, court decisions, and influential individuals have shaped the Constitution as Americans pushed the nation to live up to its founding ideals.

The Bill of Rights originally proposed 12 amendments, not 10

Congress proposed 12 amendments in 1789, not 10. Of the two amendments not ratified, the one on congressional pay raises remained dormant for 203 years before finally becoming the 27th Amendment in 1992.

The Bill of Rights was shaped by hundreds of drafts

This interactive resource from the National Constitution Center traces the complex drafting process behind the Bill of Rights, showing how state proposals and revisions evolved into the first 10 amendments.

The 1787 Constitutional Convention was initially called to amend the Articles of Confederation

Delegates initially met in 1787 to amend the Articles of Confederation, but within weeks chose to redesign the government entirely. Months of intense debate over power and representation produced the compromises that shaped the Constitution.

Surprises you may not know about the US Constitution

This article offers intriguing and lesser known insights into the creation and content of the US Constitution. Examples include that Rhode Island disliked the Constitution so much that it almost started a civil war and that Ben Franklin was so ill he needed to be carried into the Constitutional Convention in a sedan chair.

Trace how the Bill of Rights, inspired by centuries of political theory, took shape between 1774 and 1789.

Voting rights expanded from 6% of Americans in 1789 to nearly all adult citizens today

In the first US election, only white male property owners—about 6% of the population—could vote. Constitutional amendments culminating in the 26th Amendment gradually expanded voting rights to nearly all citizens aged 18 and older.

The First Amendment protects 5 distinct freedoms

Most Americans cite the amendment on free speech, but the First Amendment also protects religion, the press, peaceful assembly, and the right to petition the government—five separate guarantees in a single sentence.

In the US, any court can rule on constitutionality—unlike in most other countries

In the American system, known as diffuse judicial review, federal and state courts at every level may assess whether laws comply with the Constitution, and their decisions are ultimately reviewable by the Supreme Court. Many other democracies, by contrast, reserve constitutional review to specialized constitutional courts.

America’s founding documents were once housed in other government buildings

Today, the Constitution and Declaration are displayed at the National Archives. Still, for more than a century, they were kept by other federal institutions—including the State Department and the Library of Congress—before gaining a permanent home in the 1930s.

The Reconstruction Amendments aimed to rebuild the nation and secure freedom after slavery

Ratified between 1865 and 1870 after the conclusion of the war, the 13th, 14th, and 15th Amendments abolished slavery, guaranteed citizenship and equal protection, and extended voting rights to Black men—transforming the Constitution's definition of liberty and equality.

Explore the nearly 1,000 laws, regulations, and provisions the court has held unconstitutional since Marbury v. Madison

Over more than two centuries, the Supreme Court has struck down nearly 1,000 federal, state, and local measures—exercising its authority to invalidate laws that conflict with the Constitution and shaping civil rights, the separation of powers, and the scope of government authority.

The designs on US coins have changed a lot over the years

From states producing and issuing their own coins after the Revolutionary War, to collectors’ coins in modern times, US coins have had many design changes throughout history. You can learn about the different variations, plus what design elements are added to all US coins today, in an article.

The Second Amendment protects the right to keep and bear arms

One of the most debated amendments, the Second Amendment has divided courts, lawmakers, and the public for decades. The Supreme Court held in 2008's District of Columbia v. Heller that it protects an individual right. Legal challenges continue today.

The Seventh Amendment guarantees the right to a jury trial in federal civil cases

Ratified in 1791, this amendment applies to cases where more than $20 is at stake—an amount that has never been adjusted for inflation.

Since its inception in 1938, Congress has raised the federal minimum wage 22 times

If you want all the details about when and why these rate increases happened check out this resource from the US Department of Labor.

The United States is one of only around two dozen countries with a fully federal system of government, in which power is divided between national and state governments.

The US government has shut down 22 times since 1976

This resource breaks down every federal shutdown since 1976, showing how long each lasted and the budget disputes that caused them—revealing how routine funding failures have become in modern US politics.

Track the changes in US immigration law throughout history

This interactive timeline tracks the development of US immigration law, overlaid with time-series data on percentages of the foreign-born population. Explore how each major policy development correlated with immigration levels, revealing the relationship between legislation and demographic change.

Congress has the power to enact laws related to bankruptcy, thanks to the US Constitution

It has done just that since 1800. This legislation, which outlines the various types of bankruptcy filings, has evolved over time. The most recent iteration is the Bankruptcy Reform Act of 1978, which introduced Chapter 11 filings in an effort to make the process easier for businesses and individuals.

The original copy of the Declaration of Independence is not a pristine document, and even features a smudged anonymous handprint in the bottom left corner.

Despite being favored by 87% of Americans, Congress does not have term limits.

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

Roughly 43 million US borrowers owe roughly $1.7T in student debt, the second-largest source of consumer debt behind mortgages.

Explore an interactive map of battles from the American Revolution, along with detailed summaries of each engagement

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

The United States has had a tumultuous relationship with Cuba since its 1959 revolution, highlighted by a nuclear crisis and a decades-long trade embargo.

The idea for the Federal Reserve was conceived in secret in 1910—with bankers donning duck hunt gear for disguise while traveling to a remote country club on Georgia's Jekyll Island

Calculate how much of your tax dollars go to each federal program based on your income, filing status, and number of children

The story of Dollree Mapp, whose legal challenge over her 1957 conviction for possessing "obscene material" led to a major strengthening of the Fourth Amendment

44% of Americans say they pray at least once a day—discover how your state's religiosity stacks up against the rest of the country.

20,000 letters to the advice columnist 'Dear Abby' provide insight into prevailing sex, religion, and LGBTQ fears, anxieties, and concerns from the 1950s onward.

View the ten deadliest tornadoes in US history.

Some coin denominations have ridges etched on their sides, partly to prevent counterfeiting, in a practice called 'reeding.'

The American Society of Civil Engineers' infrastructure report card gave the US a C in 2025, its highest grade since the project launched in 1998.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

While atoms are normally made of protons, neutrons, and electrons, exotic ones have been built with antimatter—alternate versions of normal matter that live for fractions of a second and are about a billion times as rare.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

Explore the history, structure, and species of Australia's Great Barrier Reef with this interactive journey narrated by Sir David Attenborough.

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people