The very existence of this forum is an encouraging sign--it means that some very serious people are happy to devote time to the general topic of "sustainable development" and to its rigorous definition. But just as I am encouraged, I am concerned by the effort to define sustainability as a universal concept distinct from particular actions in particular places at particular times. My concern is based neither upon a "localist" view of the world nor ethical relativism, but on the notion that we learn by doing. If we can accept this premise it suggests that we can most effectively work toward a goal with only a loose, and ever-changing, definition of it. In other words, action is more important than parsing language. This is, of course, a very big topic to handle in a few lines. With my British colleague, Simon Guy, this logic has been more thoroughly articulated in: Simon Guy and Steven A. Moore. Sustainable Architectures: Natures and Cultures in Europe and North America. London and New York: Routledge, 2005.
