The Six Degrees of Kevin Bacon
You can link almost any actor in Hollywood to Kevin Bacon in six steps or less. This game highlights how hyper-connected the film industry truly is.
This parlor game is based on the idea that every person on Earth is separated by only six acquaintance links. Since Kevin Bacon has appeared in so many varied films, he serves as the perfect central hub for this network. It essentially turns the massive film industry into a giant, interconnected web. Even math experts have studied this to see how small groups quickly link to the entire world.
Source: Six Degrees of Kevin Bacon