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

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.
Public Health Threats and Pandemics
How Vaccines Changed the World
Vaccination campaigns have nearly eradicated some of the most deadly and transmissible diseases. In a rising tide of vaccine hesitancy, however, outbreaks are cropping up again.
Diplomacy and International Institutions
What Does the G7 Do?
The Group of Seven (G7) has been a forum to coordinate global policy for fifty years, but experts are increasingly questioning the group’s relevance.
United States
What Does the U.S. National Guard Do?
The National Guard is a special part of the U.S. military that answers to both state governors and the president. While it began as a “strategic reserve,” the guard has come to play an important role in domestic and overseas operations.
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.
Southeast Asia
What Is ASEAN?
The Association of Southeast Asian Nations is a regional organization that brings together disparate neighbors to address economic and security issues, but the group’s impact remains limited.
Refugees and Displaced Persons
How Does the U.S. Refugee System Work?
The United States has long been considered a safe haven for refugees from around the world, but this could change following the Trump administration’s decision to suspend the country’s decades-old refugee resettlement program.
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
The Contentious U.S.-China Trade Relationship
President Donald Trump’s trade war with China that began in his first administration has snowballed into greater tensions between the world’s biggest economies, but experts say completely decoupling from one another is likely impossible.
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.  
Public Health Threats and Pandemics
Fentanyl and the U.S. Opioid Epidemic
Opioid addiction has become one of the United States’ biggest killers, endangering public health, the economy, and national security. But closing the floodgates on fentanyl poses a significant foreign policy challenge.
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.
United Nations
Funding the United Nations: How Much Does the U.S. Pay?
Many UN agencies, programs, and missions receive crucial funding from the United States. In his second administration, President Trump is again calling for greater scrutiny of U.S. funding and involvement in the global body, and he has signaled sharp cutbacks in some payments.
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.