Explainers

Backgrounders

Authoritative, accessible, and regularly updated primers on hundreds of foreign policy topics.

Taiwan

Why China-Taiwan Relations Are So Tense

Differences over Taiwan’s status have fueled rising tensions between the island and mainland. Taiwan is the likeliest potential flash point in U.S.-China relations.

Energy and Environment

How the U.S. Oil and Gas Industry Works

The United States is the world’s top producer of oil and natural gas. Its decision to either continue at this pace or curb production to achieve its climate goals will have global consequences.

Explainers Video Filters and Cards

Brazil
What Is the BRICS Group and Why Is It Expanding?
As BRICS grows in both membership and global sway, its expansion comes with divisions among its members old and new on how to set the stage for a revised world order.
NATO (North Atlantic Treaty Organization)
What Is NATO?
The alliance continues to bolster its military deterrent in Europe amid Russia’s ongoing invasion of Ukraine and has expanded its membership in recent years.
Iran
The Islamic Revolutionary Guard Corps (IRGC)
The IRGC is one of the most powerful organizations in Iran, conceived as the principal defender of the 1979 revolution, and now a critical link to Islamist militant groups violently opposed to Israel and the United States.
China
China’s Growing Influence in Latin America
For more than two decades, China has developed close economic and security ties with many Latin American countries, including Brazil, Peru, and Venezuela. But Beijing’s increasing sway in the region continues to raise concerns in Washington, prompting greater U.S. engagement.
United States
The U.S. Trade Deficit: How Much Does It Matter?
President Trump has made reducing U.S. trade deficits a priority, but economists disagree over how much they matter and what to do about them.
Trade
What Are Tariffs?
President Donald Trump has begun his second term imposing tariffs against some of the United States’ leading trading partners to correct what he says are decades of imbalances harmful to the U.S. economy. Here’s how these taxes work.  
International Criminal Court
The Role of the ICC
The International Criminal Court was created to bring justice to the world’s worst war criminals, but debate over the court still rages.
Taiwan
Why China-Taiwan Relations Are So Tense
Differences over Taiwan’s status have fueled rising tensions between the island and mainland. Taiwan is the likeliest potential flash point in U.S.-China relations.
Mexico
Mexico’s Long War: Drugs, Crime, and the Cartels
Violence continues to rage some two decades after the Mexican government launched a war against drug cartels.
United States
How the U.S. Asylum Process Works
Asylum has become a central part of the U.S. immigration debate in recent years after border crossings reached a record high in fiscal year 2023. Here’s how the asylum process works.
Health
What Is the FDA’s Role in Public Health?
The U.S. health agency regulates the country’s foods and drugs, among other products. With the FDA’s role in drug development and nutrition policy and its COVID-19 pandemic response driving controversy, President Donald Trump is set to shake up its leadership.  
Lebanon
Lebanon: How Israel, Hezbollah, and Regional Powers Are Shaping Its Future
An array of domestic and foreign powers are vying for influence in Lebanon, including the Lebanese Armed Forces, Hezbollah, Israel, Iran, Syria, and the United States.
Somalia
Somaliland: The Horn of Africa’s Breakaway State
The would-be independent state stands in contrast to Somalia as a place of relative stability, and despite its lack of international recognition, Somaliland continues to push its own foreign policy.
Puerto Rico
Puerto Rico: A U.S. Territory in Crisis
The Caribbean island, which shares a close yet fraught relationship with the U.S. mainland, faces a multilayered economic and social crisis rooted in long-standing policy and compounded by natural disasters, the COVID-19 pandemic, migration, and government mismanagement.
Public Health Threats and Pandemics
What Is Avian Flu?
A recent surge in avian flu outbreaks in birds and some mammals, including humans, is worrying farmers, scientists, and public health experts. The threat of the virus becoming a pandemic is said to be low, but its evolution continues to raise alarms and pointed questions about preparedness.