Sublime
An inspiration engine for ideas
In societies that are essentially social contracts (as all human societies are), freeloaders who take the benefits of the contract but avoid paying all the costs erode trust in other members of the community and quickly lead to the collapse of society.
Robin Dunbar • Friends: Understanding the Power of our Most Important Relationships
There is, they suggested, a limit on the number of people we can feel sympathy for, and this seems to set a limit on other groupings where close psychological interaction is required.
Robin Dunbar • Friends: Understanding the Power of our Most Important Relationships
used the average number of different people phoned during a month (essentially the sympathy group, or 15-layer) to explore changes in network size with age.
Robin Dunbar • Friends: Understanding the Power of our Most Important Relationships
It seems that the 150-layer, however, marks an abrupt transition point in our willingness to be altruistic.
Robin Dunbar • Friends: Understanding the Power of our Most Important Relationships
Their butterfly patterns of interaction helped to keep the community integrated, allowing social information to flow from one side to the other.

