Connected
I’ve been reading a book recently: “Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives”. The authors are Christakis, N.A. and Fowler, J. H.
This book explain how behaviors, fashions, epidemics, habits, etc. spread through social networks, passing from person to person, friend to friend, spouse to spouse, neighbor to neighbor…; How people who you don’t know, distanced up to three degrees of separation from you in a social network can influence your life, your health, your wealth… and you can influence theirs.
When the authors say people up to three degrees of separation, they mean friends’ friends' friends.