So, when all is said and done, what matters is getting Greenback to a position of sustainability. We need to get out of the habit of taking more (of anything) than we put back. We need to learn how to stop creating wastes we don't resorb. We need to get out of what the cyberneticians call "positive feedback loops" because, after a while, the feedback doesn't seem all that positive. We need to find, and model, and pass on to our students a sense of balance, of equilibrium, of stability.