Denmark's 10 Jante Laws are grim, and yet they bring so much happiness.
The United States of America was ranked the 19th happiest country in the world in 2016 in the World Happiness Report. A part of America's unhappiness can be linked to the social structure of the country.
A number of scientific studies find the traits shared by intelligent people.
A thought-provoking list was published by Business Insider that summarizes some science-based commonalities between smart people. Certainly, this is the perfect place to mention that correlation doesn't imply causation. So don't necessarily run out there and get a cat to boost your IQ. Still this information that was gleaned from various studies rings true in many ways.