This week's LIFT Conference was a fantastic and quite inspiring event looking at the future of design, technology and socialisation. So, being contrary, I thought I would look at the past.
Some people see new social technology and networked culture as dangerous and 'new', and they fall back on their experience of technology and organisational culture in the late Twentieth Century as the 'established' model. Yet, in fact the reverse is true. The Twentieth century took the ideas of the industrial revolution and applied them to people. Mass production. Mass marketing. Mass slaughter.
If you look at a longer timeframe, you will see that our new era of social technology and social business is in fact more traditional, and continues very old, resilient models of network-based trade, business and socialisation. The difference is, we now have the technology and infrastructure (and arguably the globalised world) that enables us to scale up these old ways of working to support our modern life.
Whilst I don't think my talk would pass muster in a history exam, it proved quite popular as LIFT, so here's the video (it's only 5-minutes long):

Lee,
Great job - and thought provoking as usual!
I think I broadly agree with you.
Not quite sure if I'd single out the poor 20th century though - although I cannot disagree with any example you gave It seems to me that the sort of examples you gave have existed always.
I've just finished reading on the history of Gegis Khan. He took on the "mass" models of the chin and the arabic khans. I can think of many examples where heirarchical models have marshalled and exploited the masses - and in the background a more enlightened social network model has sought to restore something more just or right or whatever!!!
So, there is something here in what you say....just not entirely sure the 20th century is uniquely qualified to be singled out as the bad example.