International migration: Key findings from the U.S., Europe and the world
Millions of people around the world have migrated to the U.S. and other countries in recent years – some voluntarily, others to flee political turmoil, persecution or war.
Regional conflict and economic opportunity boost number of migrants from 25 million to 54 million.
Religion has reasserted itself as an important part of individual and national identity in a region that was once dominated by atheist communist regimes.
As of 2010, nearly a third of the world’s population identified as Christian. But if demographic trends persist, Islam will close the gap by the middle of the 21st century.
Thursday, April 23, 10 A.M. to 11:30 A.M. The Pew Research Center’s new demographic projections– the first formal forecasts using data on age, fertility, mortality, migration and religious switching for the world’s eight major religious groups – finds that the religious profile of the world is rapidly changing. By 2050, the number of Muslims around […]
© 2025 Pew Research Center