The Network effect (Theodore Vale) : Becomes more valuable as more people join creating a stronger connection as you come into contact with more people creating more data with stronger pathways which lead onto more people becoming connected ever expanding a network. For example one person knows two others. the others know two others which multiply people using the network.

The loop theory (Norbert Weiner): predicting future behaviour from gathered data erecting an outcome

Dunbars number (150) (Robin Dunbar) :Dunbar’s number is a suggested cognitive limit to the number of people with whom one can maintain stable social relationships—relationships in which an individual knows who each person is and how each person relates to every other person.