Traditional homes are poorly engineered and inadequate; they sag, leak and groan. But ultralight architecture such as geodomes, membranes, thin shells and tensegrity structures tends to crumble like a fortune cookie. They degrade suddenly and gracelessly in nonlinear, catastrophic ways. As Stewart Brand points out in his book HOW BUILDINGS LEARN, geodesic domes cannot learn. They do so much with so little that there is nothing left to teach them. They make no provision for organic growth or human messiness. They have a perfect present and no future.