The Square and the Tower: Networks and Power, from the Freemasons to Facebook

Most history is hierarchical: it's about emperors, presidents, prime ministers and field marshals. It's about states, armies and corporations. It's about orders from on high. Even history "from below" is often about trade unions and workers' parties. But what if that's simply because hierarchical institutions create the archives that historians rely on? What if we are missing the informal, less well documented social networks that are the true sources of power and drivers of change?