Sublime

Rather, by and large, most people prefer to sign up as friends mainly the people they already know.

It is not that we can’t speak to very large numbers of individuals; it is that we cannot have a conversation with them.

sets of three subgroups who all ‘like’ each other give the social group structural stability and resilience in the face of external attack.

(known as the ‘scaling ratio’) is very close to three.

The 150-layer is what you might call the wedding/bar mitzvah/funeral group

The cognitive challenge of surviving in increasingly larger social groups selected for increases in brain size and function.

Extraverts have been reported to have better social skills than introverts, so it seems that it is not their skills that lead to poorer-quality relationships but simply the fact that they are dividing their time (and hence emotional capital) among more individuals.

occasional large, more formal feast involving many people creates bonds within the wider community.