Luhmann says that we need to build up our contradictions, so that we can respond to new situations. In our interconnected world, there's rapid change. There's some democracy on the Internet. From a process view, this makes sense. From a policy perspective, bifurcations drive us towards airing convictions energetically.
Interconnected world is the terrain.
Questions Dissertation is at Saybrook, Plenum is interested, but the book is thick. No, there are no closed social systems. Luhmann says any conversation which invites someone in makes a larger closed system.