Of all the technologies and assets that are produced in our current world, few rival in importance the structures built for work and living. Buildings are structures for shelter, locations for the delivery of electricity, water, and electronic information; they are settings for the gatherings of people; they are secure sites for the storage of equipment, furnishings, food, and valuable documents; and finally they provide living and working space, places for nurture in youth, rest in old age, and cooperation in production of all kinds. The styles of buildings are a form of social expression that must be conceived in relationship to these features and functions, and ultimately with theory that is both cultural and ecological.