So, there is a lot of talk about how we are leading lives which are unsustainable in the long run. Societies have needs that are unsustainable, population growth is unsustainable, consumption growth is unsustainable and on and on... But think about it, is the entire capitalist economy not about growth? And if this economy has to thrive and survive and deliver consistent growth, how is that going to come about, and manage to co-exist with the concept of sustainability?