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Americans view Canada, Great Britain, France and Japan the best of 19 countries asked about -- and North Korea, Afghanistan, Iran, Russia and Iraq the worst.
Americans rated various forms of terrorism, development of nuclear weapons by unfriendly countries, and China's military power as the top critical threats to U.S. vital interests, just before the Russian invasion of Ukraine.
Iranians continue to report economic woes, with 59% saying their local economies are getting worse and 91% reporting it is a bad time to find a job where they live.
Shortly into President Ebrahim Raisi's first term, 72% of Iranians approve of the job he is doing and 59% have confidence in their national government.
Amid an economic crisis and a health crisis that has seen the country become the coronavirus' epicenter in the Middle East, Iranians' confidence in their national government has fallen below 50% for the first time since Gallup's tracking began.
Iranians' confidence in their economy collapsed, along with their outlook on their lives, after President Donald Trump's decision a year ago to leave the Iran nuclear deal and reimpose economic sanctions.
3 Billion Still Looking for Great Jobs
Gallup reviews its top world findings from 2015 based on surveys conducted in more than 140 countries through the Gallup World Poll.
While observers are lauding the nuclear agreement reached among international powers Tuesday as a way to reshape relations between Iran and the West, Gallup surveys show distrust on both sides.
Fewer Iranians report that sanctions are affecting their livelihoods to the degree that they once did. More see their economy and their living standards improving.