I worked on verifying Dunbar's number a few years back using social media data from tens of millions of users: https://arxiv.org/abs/1105.5170 https://arxiv.org

I worked on verifying Dunbar's number a few years back using social media data from tens of millions of users: https://arxiv.org/abs/1105.5170 https://arxiv.org/abs/1105.5170 The main operational idea is that we have a finite capacity for interactions so that if we try to create too many interactions, they'll be shallower than if we focus on just a few important ones.