Facebook , a chapter in history

In his postFacebooksofting and Facebacklashing Antony Mayfield makes the following observation:

"Facebook has lost some its context for me, as Danah Boyd put it recently. I'm drawing more on my more focussed, more private networks for personal communications and general networking fixes...

Facebook is bringing networks into the lives of many people for the first time. Think of Facebook as a chapter in the story of the rise of online networks as the defining media model of our age and you'll have a clearer understanding of what's going on than micro-focussed doom-mongers..."