No man (or woman) is an island, as the saying goes. We’re all part of a global network comprised of many, many smaller and interlinking ones where people are connected to each other based on location, friendships, profession etc. A social network is defined by the constructs of “nodes” and “links” (or “actors” and “ties”), which are applied to a community of people, which can be formal (a working group of scientists) or...