There are several big ideas around at the moment:
... 'the sharing economy':
Futures Forum: Jeremy Rifkin and the Collaborative Commons
Futures Forum: The 'sharing economy' in the news...
Futures Forum: Building resilience in local communities and economies: the Transition Town movement today
Futures Forum: The Story of Stuff: "You cannot run a linear system on a finite planet indefinitely"
Futures Forum: The Circular Economy
... and 'nudging':
Futures Forum: Concerns for campaigning: Lobbying Bill crucial stage: reports
The commentator Evgeny Morozov brought these ideas together in a critical piece last weekend: