I'm not suggesting a voluntary de-growth. That ship is gone, together with the resources needed to sustain civilization. When resource availability start to decline there will be no choice for us to maintain modern life - the energy and stuff simply won't be there. What I'm trying to communicate here is that we have realize that material civilization is unsustainable on a finite planet no matter what. The choice we have is this: will we handle this change peacefully and equitably, trying to share whatever we have, or kill each other in a mass scrambling for resources.