The Basics
We hope you will find the resources here useful as you seek to learn more about the phenomenon of international migration and some of the 281 million people globally who live outside their country of birth.
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Temporary Visa Holders in the United States
The number of U.S. temporary visas plummeted during the COVID-19 pandemic, rebounded, and then fell again in fiscal year (FY) 2025. Preliminary data suggest temporary visa issuance declined further in FY 2026.
How Post-9/11 Tools Have Been Used for U.S. Immigration Enforcement
Twenty-five years after the terrorist attacks of Sept 11, 2001 led to a dramatic expansion of the U.S. national security infrastructure, the Trump administration has repointed many tools to detect, detain, and deport noncitizens.
Could a Super El Niño Displace Millions from Their Homes?
The 2026 El Niño is expected to be historic, potentially prompting disasters that force millions of people from their homes.
Haitian Immigrants in the United States
Haitian immigration to the United States has grown sharply in recent decades, amid a series of profound challenges in Haiti.
Precedent or Cautionary Tale? The U.S. Climate-Driven Relocation of Isle de Jean Charles
What happened when the U.S. government tried to resettle a whole community because of the risks posed by climate change? The resettlement of Louisiana’s Isle de Jean Charles is a complicated story.
Korean Immigrants in the United States
Korean immigrants in the United States tend to be highly educated, naturalized U.S. citizens, and earn high incomes.
Fiji on the Front Lines of Climate Mobility
Few nations have experienced climate hazards as directly as Fiji, and perhaps none have planned more proactively to relocate communities away from vulnerable places. Yet for many Fijians, the choice to leave home is a difficult one.
Mexican Immigrants in the United States
Mexicans remain the largest immigrant group in the United States, but their numbers have declined in recent years.
How the World Is Learning to Respond Collectively to Climate Displacement
The coordinated global response to climate change-driven displacement is relatively new and continuing to evolve. Where do things stand?
Why Is Sudan's Humanitarian Crisis Largely Invisible?
Sudan is experiencing the world's largest displacement crisis, but why is the crisis is overlooked, what are the regional spillover effects, and what would an effective international response require?
