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In the last few decades, many European and American cities and towns experienced economic, social and spatial structural change. Strategies for urban regeneration include investments in infrastructures for production, consumption and communication, as well as marketing and branding measures, and urban design schemes. Bringing together leading academics from across a range of disciplines, including Douglas Kelbaugh, Ali Madanipour, Saskia Sassen, Gregory Ashworth, Nan Elin, Emily Talen, and many others, Emergent Urbanism identifies the specific issues dominating today's urban planning and urban.

Our cities are undergoing a rapid transformation of public spaces due to different factors, such as economic and cultural globalization, demographic transformations, marketing strategies, urban planning and design approaches, medialization reinterpretations, social networks, and others. The urban realm itself is the collection of public spaces and places—buildings, squares, streets, landscapes, and ecosystems, as well as processes, mindscapes, and people that make up and shape any environment. In that respect, urban planning and design is really characterized by two distinct processes that transubstantiate space and place: static and dynamic. This qualitative, reflective article discusses these issues, taking a standpoint from the notion of public space as a common good. This notion is discussed in relation to the factors that transform our cities and is analyzed in relation to the concept of public good. We reflect this discussion vis-à-vis the views of the leading paradigms in urban planning and design, and their intake on and outlook on these complex issues.

At this historical moment, the urban planning and design professions are confronted with the twin challenges of unprecedented rapid urbanization on the one hand, and declining post-industrial regions on the other. In this environment, there are many different and often conflicting ideas about urban heritage and its relevance for contemporary urban planning and design. In this paper, we look for commonalities and a way forward from among a range of competing urban design models. We examine the illustrative case study of the geography and landscape of Detroit, USA. We consider seven contemporary urban planning and design ideals that dominate the contemporary planning and design discourse and their different views of the past and urban heritage in relation to the approaches in Detroit. From these, we draw a synthesis approach, making several recommendations and observations with a focus on the capacities of so-called "placemaking" approaches. In this paper, urban heritage is understood and examined as contributing a pattern of infrastructure that provides a helpful supportive framework, and (importantly) a set of structural limitations (e.g., historic plot boundaries), that can serve as a generative resource for new urban planning and design. We conclude that the necessary framework for democratic participation and opportunity within urban space can be provided most directly by leveraging the assets of urban heritage. ; QC 20220322