Susan Pinker’s TEDTalk offers some good neuroscience insights reinforcing the health benefits of a strong social network.  She emphasizes the power of having stable relationships and frequent face-to-face interactions to increase brain activity and state of well-being.   Hope you find this helpful:

http://https//www.ted.com/talks/susan_pinker_the_secret_to_living_longer_may_be_your_social_lifeWhat can you do to build and sustain your village?