Gallup Inc. asked roughly 1,000 people in each of 148 countries the following questions: Did you feel well-respected yesterday? Were you treated with respect all day yesterday? Did you laugh or smile a lot yesterday? Did you learn or do something interesting yesterday? …

HAPPIEST

Panama, 85 percent

Paraguay, 85 percent

El Salvador, 84 percent…

SADDEST

Singapore, 46 percent

Armenia, 49 percent

Iraq, 50 percent