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

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.
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.
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.
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.
Climate Change
Global Climate Agreements: Successes and Failures
International efforts, such as the Paris Agreement, aim to reduce greenhouse gas emissions. But experts say countries aren’t doing enough to limit dangerous global warming.
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.
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.