Wiser minds than me have been blogging about Dunbar during the week including Matt Rutherford who introduced me to it. Anything that JP Rangaswami is involved in is usually worth a read.

Your Digital Dunbar Number comes from the British anthropologist Robin Dunbar who suggests that 150 is the maximum number of people with whom any one person can maintain stable social relationships. That theoretical limit is known to sociologists and anthropologists as Dunbar’s number.

Matt reckons his is about 120 and I was going to say the same until I looked at what Dunbar classifies the "stable social relationship" as. It turns out it's

 

the kind of relationships that goes with knowing who each person is and how each person relates socially to every other person

 

in which case I'm with JP and my latest interest (Twitter) is only making that grow. Facebook did the same and though there are lots of folks there that would fall outside of this definition I think I can safely say my Dunbar number is in the 300 range. Ironically I just started using an Outlook add-on this week that helps you identify people you've lost contact with which is very handy. I've sent a few emails to folks I've lost touch with based on it.

What do you think your Dunbar number is? Paul Walsh, yours must be 500? more?