John Frazer's lecture, like the seminal book of the same name, investigates the fundamental form-generating processes in architecture, considering architecture as a form of artificial life, and proposing a genetic representation in a form of DNA-like code-script, which can then be subject to developmental and evolutionary processes in response to the user and the environment. The aim of an evolutionary architecture is to achieve in the built environment the symbiotic behaviour and metabolic balance found in the natural environment. To do so, it operates like an organism, in a direct analogy with the underlying design process of nature. John Frazer, through his long association with the AA and his work at the Hong Kong Polytechnic University, has been a pioneer in the development of intelligent and interactive building design systems and evolutionary design computation. His work has been extensively published in journals and books including the AA publication An Evolutionary Architecture launched to coincide with an exhibition at the AA in January 1995. NB: Cuts out.