Ratings for the U.S. remain mostly positive, with a global median of 69% expressing a favorable view. Countries also express broad support for America's military efforts against ISIS, but are critical of the U.S. government's use of torture after 9/11.
Majorities or pluralities in 31 of 40 countries surveyed hold an unfavorable opinion of the Islamic Republic. And in several Muslim-majority countries in the Middle East and Asia, ratings have declined considerably in recent years.
Four decades after the controversial war, the Vietnamese public sees the United States as a helpful ally and even embraces some of the core tenets of capitalism.
This is a pivotal year in U.S.-Japan relations. As the two nations mark the 70th anniversary of the end of World War II in August, it is a moment for both the American and Japanese publics to reflect on the past — but also to take the temperature of the current bilateral relationship and to consider its future.
We asked people in both countries if they associated particular words such as "hardworking," "inventive" or "selfish" with people in the other country.
The future belongs to the young. This is especially evident in parts of Asia. How young Asians see the world, their own futures and those of their countries often differs from the attitudes of their elders. Their differing views may go a long way toward determining their fate, that of their nations and of Asia.
About half of young Europeans ages 18 to 33 have a positive view of China, but that view is tempered by their opinions about that country's human rights record.
In six of seven European Union countries surveyed by the Pew Research Center, roughly a third or less of young people born after 1980 have a favorable opinion of Russia.