How do we measure areas which constitute sustainable development? How do we put numbers or colours or other descriptors to these indicators of the quality of life or of well-being? One answer to that is, perhaps, do we need to? Another question we must address is: Are there indicators that are not amenable to quantification? And, if we do try to quantify them, do we fall into the same trap as economists have fallen into for the last one hundred and fifty years— that is, in believing that only things that have numbers mean anything? (Khosla, 1995, p. 9).