Explore the countries with a federal system—and see how they work

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.

Federal systems are a minority among the United Nations' 193 members

Of the United Nations' 193 member countries, roughly two dozen use a federal system, dividing power constitutionally between national and subnational governments. This group includes the United States, India, Canada, Germany, and more. The video walks through examples of how these states operate.

The United States is the world's oldest continuously operating federal system under a written constitution

The US pioneered federalism in the late 18th century, and many countries later adopted federal systems to manage conflict and share power. This resource features interactive maps that trace the spread of federal systems worldwide from 1900 to the present.

Compare how justice ministries and courts are structured around the world

The Federal Judicial Center's "Judiciaries Worldwide" series provides clear and accessible comparisons of how various countries organize their justice ministries, prosecutors, courts, and judicial councils—emphasizing global models of independence, oversight, and institutional structure.

Visualize government spending with USAFacts

This resource turns complex federal budget data into clear charts and summaries, letting users explore how much the government spends; where the money goes; and how revenue, deficits, and debt change over time.

Visualizing the symbols and history of world flags

More than 200 world flags feature high-intent designs, projecting ideals and values to the world through archetypal symbols, colors, and shapes. This page effectively depicts the data behind symbol and shape usage, how much each country's flag has changed over time, the most popular colors used, and more in a series of elegantly simple charts.

Visually explore the federal government’s evolving role in education

This photo collection traces the US shift from community and private schooling to federal oversight and ongoing political debates about the Department of Education.

Mapping NATO's 32 countries across North America and Europe

See an updated map with the option to learn more about each country's membership and role in the alliance. The map shows the borders of its member countries with extra filters capable of locating its many civilian structures, nonmember partners, positions of missile sites, and more.

See how local, state, and federal governments divide the cost of public services

Federal, state, and local governments share responsibility for funding public services. Education, roads, and social programs are funded through a complicated mix of taxes and intergovernmental transfers.

Explore the state of religious freedom around the world

This interactive tool visualizes government restrictions on religion and social hostilities involving religion across countries worldwide. It enables users to compare nations and monitor changes over time.

Roughly half of the world's nations are (relatively young) electoral democracies

Classifying countries by governance type involves leaning into technical systems like the Regimes of the World classification. In this data dive, see a map of the world's oldest and youngest electoral democracies, as well as liberal democracies (which are measured by the protection of minorities and checks on executive power from the legislature).

Explore the Council on Foreign Relations' essay collection on the future of US foreign policy

This project brings together expert essays examining the future of American strategy, regional relations, geoeconomics, great power rivalry, and war in a rapidly changing global landscape.

Explore an interactive timeline of the most important moments in the WEF’s history

This interactive traces the World Economic Forum’s evolution from a small European meeting in the 1970s into a global power hub, highlighting pivotal moments in Davos, landmark speeches, and turning points that have shaped its outsized influence on world affairs.

What is the Fediverse?

The "fediverse" is a league of like-minded apps looking to make our digital identities—including posts, followers, activity—move seamlessly between networks. It's a decentralized approach, making various social networks interoperable in contrast to Facebook and Twitter, where content is platform-specific. The fediverse provides stability and control to users. Learn more here.

How the British Empire transformed into today’s voluntary Commonwealth of Nations

This video explains how former British colonies—now independent states—evolved into the modern Commonwealth, a loose association representing nearly one-third of the world’s population. It traces the shift from imperial rule to a cooperative forum with no legal obligations to Britain or its monarch.

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.

Why countries have credit ratings

Sovereign credit ratings work like national credit scores, measuring a country’s ability and willingness to repay its debt. Moody’s, S&P, and Fitch are the major agencies assigning these ratings, which influence borrowing costs and investor confidence.

Explore an interactive map of the unified theories of everything

This interactive concisely describes many highly complex theories ranging from quantum gravity and black holes to dark matter and energy. Supplementary resources, key questions, and possible solutions accompany each description. As of 2026, no developed theory provides an accepted explanation of all observed phenomena in the universe at all scales.

The rivalry between Alexander Hamilton and Thomas Jefferson centered on federalism—the question of how much power the federal government should hold relative to the states.

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

Explore a map of data centers worldwide

As of February 2026, the US has more data centers (over 4,000) than the next 15 countries combined, thanks to years of investment by cloud service providers and technology companies. The next largest data center footprints come from the UK and Germany, with about 500 facilities each, followed by China with about 370.

Explore landforms that exist across America's national parks

Landforms are not just scenic vistas; they are geological storytellers that shape ecosystems, climates, and our understanding of Earth's history. In this comprehensive look at landforms from the National Park Service, you will learn not only about different types of American landforms, but you will understand how these geological features are shaped by various forces, how they reveal an area's geological history, and how they influence climate and ecology.

Explore the world of fan fiction

This guide to the genre's major platforms breaks down their strengths and weaknesses, offering an excellent primer for the uninitiated newcomers.

View a map of the balancing authorities managing electric systems and costs throughout the continental US

These are made up of utilities, Power Marketing Administrations—hydropower marketers from the Department of Energy—and groups of utilities that have formed regional entities called Regional Transmission Organizations or Independent System Operators. Collectively, balancing authorities ensure supply meets demand and can direct utilities to implement rolling blackouts to prevent permanent damage to electrical equipment.

Search this digital archive of 19th-century "panoramic" maps of US and Canadian cities

The panoramic map was a popular cartographic form used to depict U.S. and Canadian cities and towns during the late nineteenth and early twentieth centuries. You can peruse a gallery of almost 2,000 of them in this digital archive from the Library...

Medieval Europe was a patchwork of hundreds of competing states

In the Middle Ages, Europe was divided into hundreds of kingdoms, duchies, and territories, bearing little resemblance to modern borders. This map captures the political landscape in 1444, as the Ottoman Empire was in the midst of its rise.

How stress affects every organ in the body

If you are a visual learner, this resource is for you. Not only does this article from the World Economic Forum outline the causes of modern stress along with helpful strategies, but they have created an approachable infographic to show exactly how stress manifests throughout our different bodily systems. Pair this visual guide with our other resources to gain a deep knowledge of stress and the human body.

Eurovision voting largely follows cultural blocs

In 2025, France's AFP analyzed the voting data from every Eurovision Song Contest and found that how countries vote often reflects long-standing cultural associations, with Nordic countries, Baltic states, and former Soviet nations tending to vote in solidarity.

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

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

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

See the 25 of the best photos of auroras from around the world.

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

Stanford built a Google Maps for the Roman Empire, revealing how much it cost to travel in the ancient world

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

Discover the catastrophic consequences of a failure of the US electrical grid—something that is more likely than many Americans think.

How fusion—which releases energy when two lighter atoms combine to form a heavier atom—differs from fission

Learn how to read a prospectus, the juicy document that any company must file with the SEC before going public.

Explore a list of the 100 best novels of all time, compiled by some of the world's best living writers, including Salman Rushdie, Stephen King, and Jennifer Egan.

A century of Billboard issues documenting the evolution of popular music.

Legendary architect Frank Lloyd Wright designed the SC Johnson headquarters in Wisconsin, aiming to make a cathedral-like workplace

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Visualize how CRISPR-Cas9—a type of immune system used by single-celled organisms to attack invasive viruses—targets and makes precise changes to a gene's DNA.

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

The Brothers Grimm were lawyers before they were storytellers, and became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The Russia-Ukraine conflict is the largest ground war in Europe since World War II in casualties, forces mobilized, and displacement of civilians.

Ebola is a filovirus, meaning it resembles a thread under a microscope, though it sometimes twists and can resemble a bowl of spaghetti.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

In preparation for this weekend's Eurovision finale, which is something like the World Cup of pop music, here's a young Céline Dion performing (for Switzerland?) at the 1988 competition.