This paper addresses the challenges faced by planning and design education programmes when focusing on more sustainable ways of dealing with global changes. While the dominant discourse addresses the fact that planning programmes discuss the Global South through the lens of planning theory and practice from the Global North, the proposal is to shift the debate and recognise that, from a complexity perspective, planning problems are not so different from region to region. The argument is that, although the theory has moved on, when discussing conceptual aspects of planning, spatial planning practice is still focused on objects rather than the relationship between them (be they buildings, streets, neighbourhoods or even cities). Assuming that urban territories are not objects and do not develop in a linear way, but rather evolve, the proposal is to reflect on how planning and design education addresses urban evolution. This paper suggests a revision of planning and design approaches to informality, given the participation in recent years of a joint studio in Bandung, Indonesia. The alternative perspective offered here involves a re-examination of concepts and deconstruction of dichotomies. The main findings rely on the interpretation of formalisation processes (in the Global North) through the lens of complexity theory, which has facilitated understanding of today’s informal settlements (in the Global South). It suggests the deconstruction of dichotomies, such as informal versus formal, thus, positing the need for a major shift on planning and design rules that focus less on objects and more on the relationship between them.