So what is it that drives the forms to be what they are, even if they are not stable entities in urban flux? As indicated the data inputs from the context — be they physical, social, natural, political, economical — merge with program requirements to create various scenarios. The computer, specifically parametric modeling, is the tool that enables, for example, 100 strategies to be explored in the New City Park project, three of which were fleshed out in some detail and presented here. With parametric modeling’s ability to let form fluctuate depending on various inputs, time is a factor that is inserted into these urban projects. The presence of the fourth dimension means phasing and change can be considered, something that certainly makes sense with projects spanning many years, various politicians, and even multiple economic cycles. This consideration brings the projects towards the “collective form” of the book’s subtitle (influenced by Fumihiko Maki’s publication Investigations of Collective Form – 7.5mb PDF link), but of course the fact that the projects are overseen by a single architect/firm is a paradox of this approach. At its most basic, collective form is found in the Medieval hill towns of Italy, which evolved over long periods of time through negotiations of the different neighbors and landowners. But in Mayne’s hands, evolution is sped up through the integration of the computer and the contextual data it is able to process. It’s an interesting approach that is backed up with a solid bibliography (a valuable component of the book) and the usual stunning visual documentation that defines Morphosis’s architectural projects.