I used to have a lot of friends. In fact, one of my friends recently commented on how easy it is for me to make friends. This may have been true once, but I'm not so sure of my friend-making abilities these days.
I'm not very confident in my friend-keeping abilities. If you compared the number of good friends I have now to the amount I had five years ago, there would be a huge difference. I have fewer friendships than I used to.
Lead researchers, Satoshi Kanazawa and Norman Li, evolutionary psychologists in England, found that, while most people's happiness increased in relation to a decrease in population density (as well has a high percentage of interactions with loved ones), people who are extremely intelligent are actually happier when they're not hanging out with friends.
首席研究员、英格兰的进化心理学家Satoshi Kanazawa和Norman Li发现：虽然随着人口密度的降低，人们的幸福度上升（以及与心爱的人互动更频繁），但对于那些超聪明的人而言，不和朋友出去玩才是他们更开心的时候。
"More intelligent individuals experience lower life satisfaction with more frequent socialization with friends," the study said.
In an article on The Washington Post, Carol Graham, a Brookings Institute researcher who studies the economics of happiness, said, "The findings suggest (and it is no surprise) that those with more intelligence and the capacity to use it ... are less likely to spend so much time socializing because they are focused on some other longer term objective."
It makes sense. Super-smart people usually have exciting new theories they want to prove, or inventions they're working on that will change the world. The highly intelligent don't want to spend their time socializing - they want to pursue their goals. They've got more important things to do than listen to their friends talk about their vacations in Italy over dinner.
The study suggests that the brains of our hunter-gatherer ancestors were perfectly adapted to life on the African savannah, where the population would have been scattered, with people living in groups of around 150. Social interaction would have been extremely important in order to survive, especially in terms of co-operation and finding a mate, but space would have been crucial as well.