Allison Ewing shares her expertise on green design at the Hanley Wood Vision 2020 Video Symposium. She discusses why the building is at a Darwinian crossroads and it’s time to evolve an Architecture of the Fittest. Architects must find solutions that are attractive to home developers who will build 75% of new housing in the coming decades. Nature, with 3.8 billion years of R&D has a lot to teach us about adaptive — and cost effective — strategies in a changing environment. Ms. Ewing discusses how bigger is not better, rather connecting people with the landscape is fulfilling, and how creative designers are finding clever solutions to living richly in a small setting. She tackles creating the zero energy home, the use of low-embodied energy materials and new technologies such as 3D printed buildings which will transform how we build. Some researchers are even exploring buildings which are self-assembling, patterning processes on nature.