One might add social media to that list as well. If there's a Dunbar's number in real life, there definitely is one for online communities too. https://en.wikip

One might add social media to that list as well. If there's a Dunbar's number in real life, there definitely is one for online communities too. https://en.wikipedia.org/wiki/Dunbar's_number https://en.wikipedia.org/wiki/Dunbar's_number