Professor Tim Jackson is one of the unusual academics who can put over his views very eloquently and precisely without drivelling on in scientific language.
He recently released a book called Prosperity without growth, which challenges the assumptions behind the relentless economic growth model required by capitalism. It's a book with provokes, enlightens and is down right sensible.
This is a short video of a talk Tim Jackson recently gave at a Prince's Foundation conference, Building: a new green economy. His phrase "it's all about the spaces in between" is a very strong point to think over.