Before Facebook, Twitter and Linkedin, the notion that everyone
and everything was inter-connected with each other wasn’t quite as self evident as it now seems. ‘Six degrees of separation’ was how it was popularly couched. There was the play and the film of the same name and then along came the trivia game ‘Six Degrees of Kevin Bacon’ – which required that a group of players connect any film actor in history to Kevin Bacon in as few steps as possible. At the time, the idea seemed little more than a bit of a laugh. But then, in the mid-1990s, it occurred to a couple of US-based mathematicians that some bigger truths might well lurk beneath the levity.