The savanna theory follows logic that makes some sense: Our ancestors were used to traveling vast spaces in tight-knit groups, so modern humans in high-density areas, like cities, are generally less happy than their suburban and rural counterparts. Close social interaction, the theory continues, is another component of happiness; collaborating on how to bring down that wildebeest brought happiness to prehistoric humans because, hey, they got to eat!
"Spending time with friends is a very natural activity that was likely necessary for survival over millions of years," Dr. Norman Li, associate professor of psychology at Singapore Management University and co-author of the study, said in an email.
Today those feel-good vibes around socialization persist, giving happy hour its signature adjective. Except, again, in super-smart people. But why?