“…Van der Leeuw (2009) is not alone in considering human settlements to be an example of non-linear development and the behaviour of complex adaptive systems. Various urban planners (Allen, 1997, who worked with Ilya Prigogine;Batty, 2005Batty, , 2010Byrne, 2003;Portugali, 2000Portugali, , 2009Portugali, , 2011Portugali, , 2012, who also works with Hermann Haken; Rauws, 2015;Verhees, 2013;Winestock, 2010;Zhang et al, 2015) consider cities as complex adaptive systems. These complex adaptive cities have been transformed, from being not much more than nodes on trade routes and river and mountain crossings, into markets, which at some point required protection, leading to defensive walls, and so on, heading towards the industrial revolution with its enabling and constraining conditions, producing the twentiethcentury city, which can variously be characterized as booming, functional, congested, communicative or progressive, or as a centre of knowledge and learning, leisure and entertainment.…”