Publications

People around the world identify ISIS and climate change as the leading international threats. Many also name cyberattacks from other countries and the condition of the global economy as major challenges.

A series of graphics explores public opinion on abortion, illustrating how opinion differs among various demographic groups, including religious, political, age and gender groups.

In Pew Research Center polling in 2001, Americans opposed same-sex marriage by a margin of 57% to 35%. Since then, support for same-sex marriage has steadily grown. Based on polling in 2016, a majority of Americans (55%) support same-sex marriage, compared with 37% who oppose it. See the latest data on same-sex marriage.

Citizens of European Union countries have the right to move between EU countries. As of 2015, nearly 20 million people, or about 4% of the EU’s birth population, lived in a European country in which they were not born.

The share of newlyweds married to someone of a different race or ethnicity has been steadily climbing in the United States. In 1967, 3% of newlyweds were intermarried, and by 2015, that share had risen to 17%.

The first video in Pew Research Center’s Methods 101 series helps explain random sampling – a concept that lies at the heart of all probability-based survey research – and why it’s important.

Many Americans turned to Google to learn about the Flint water crisis. An analysis of aggregated searches over time illustrates how, in today's digital environment, public interest shifts as a story unfolds.