The Moving Observer: Walking, Sensory Atmospheres and Situated Urban Evidence (Byrne, Mason, Macpherson, Robinson, Gandy, Wesener, Üstün, Iturra) · LAPIEZA LAB · Anto Lloveras · Socioplastics · 2026

Urban knowledge changes when the observer moves. A street, park, route or neighbourhood does not present the same object to a stationary survey, a passing pedestrian, a cyclist, a participant walking beside a researcher, a camera moving without a predetermined destination, or a body attending to sound, light, smell, fatigue and memory. Movement is not simply a means of reaching the field; it is one of the conditions through which the field becomes knowable. Byrne’s distinction between structured and naturalistic observation makes this explicit at the level of research design: observation is an interpretive act whose validity depends on where, when and how attention is organised, not a transparent extraction of facts from space.

Comparative urbanism becomes intellectually mature when the city ceases to function as a self-evident territorial unit and becomes instead a historically specific configuration whose meaning depends on relations extending beyond itself.

The trajectory from Hoselitz through Southall, Friedmann, Pickvance and Nijman reveals successive enlargements of the comparative object. Hoselitz still works through developmental typology, asking how different kinds of cities contribute to or inhibit economic and cultural transformation. His generative/parasitic distinction belongs to the mid-century search for regularities capable of explaining urbanisation across divergent societies, yet it already refuses to treat city growth as valuable in itself: what matters is the relation between urban concentration and wider social transformation. Southall’s cross-cultural anthropology makes the challenge more empirical and more plural. Urbanisation appears through kinship, ethnicity, caste, migration, household form, transport, locality and supralocal institutions across Africa, Asia, Latin America and the Pacific. The city becomes comparable only by decomposing the supposedly universal urban condition into social relations whose combinations vary historically and geographically. Friedmann then changes scale. Building on the Marxian urban turn associated with Castells and Harvey, the world-city hypothesis places urban formation inside the world economy. A city’s internal structure is no longer analytically sufficient; its economic functions and position within transnational accumulation become constitutive. Comparison therefore shifts from cities as bounded societies to cities as differentiated positions in global systems. Pickvance subsequently formalises the epistemological problem that these enlargements create. If different contexts can produce similar outcomes and similar contexts can produce different outcomes, comparison cannot rely on a single causal grammar. His four varieties of comparative analysis make plural causation explicit and show that explanatory comparison is a research design for analysing causal configurations rather than a descriptive juxtaposition of places. Nijman carries this insight directly into urban geography. Comparison must operate between universalism and irreducible place-particularity, incorporating historical sequence and geographical context as explanatory dimensions. His “deep analogies” provide the most precise synthesis of the historical lineage: the object of comparison is neither superficial resemblance nor total urban form, but a process that may recur through very different spatial, institutional and temporal configurations. Miami can therefore be read through Amsterdam, Hong Kong, Shanghai and Dublin without becoming equivalent to any of them. The comparison strengthens specificity while also producing theory. Historical comparative urbanism emerges from this sequence as an epistemology of bounded generalisation: it constructs concepts capable of travelling, but subjects their reach to the resistance of place, history and causal complexity. For contemporary urban research, this historical lineage matters because many supposedly new methodological problems were already visible in earlier comparative work. The current insistence on relational cities, planetary connections, situated theory and globally distributed conceptual production is not a rupture with comparison but a transformation of its scale and assumptions. Hoselitz demonstrates the productivity and danger of typology: categories can organise difference, but they can also harden developmental hierarchies. Southall demonstrates that comparative range can destabilise those hierarchies by bringing multiple cultural and institutional forms into the same analytical field. Friedmann shows that external relations are not contextual supplements but internal conditions of urban formation. Pickvance makes causal heterogeneity methodologically legitimate, while Nijman turns geographical and historical difference into an active check on abstraction. Together they establish a powerful principle for comparative urban epistemology: generalisation should emerge from carefully constructed relations among cases rather than from the prior assumption that cases belong to a common universal type. This has direct consequences for how an urban research corpus should be organised. Cases should remain richly situated, but their relations should be explicit enough to permit comparison across scale, period and geography. The archive must preserve not only outcomes but causal conditions, temporal sequences, institutional structures and external connections. A city can then be compared through migration regimes, state relations, infrastructural connectivity, financial roles or social forms without requiring overall similarity. This makes comparison generative: each new case can reveal a deep analogy, expose a false equivalence, split an inherited category or identify a causal pathway previously hidden by a dominant model. The historical value of these texts therefore exceeds disciplinary genealogy. They provide a methodological architecture for producing urban knowledge that is simultaneously mobile and resistant to simplification. Within Socioplastics, this condition condenses as GenealogyGradient.

Anto Lloveras is an architect and urban researcher working across comparative urbanism, spatial epistemology, archives and relational infrastructures through LAPIEZA LAB and Socioplastics.

THE EUROPEAN CITY DOES NOT HAVE ONE NATURE: THERMAL FIELDS, ECOLOGICAL SCALES, HEALTH EFFECTS AND PLANNING DEVICES IN MADRID, ROME, PARIS, BERLIN, LONDON AND OSLO · LAPIEZA LAB · ANTO LLOVERAS · SOCIOPLASTICS · 2026

European metropolitan nature becomes legible only when the category “green space” is broken into the spatial, ecological, social and institutional relations that make environmental capacity operative. The ten studies assembled across Madrid, Rome, Paris, Berlin, London and Oslo do not converge on a universal green metric; they progressively dismantle one. Madrid first shows that landscape performance exceeds cadastral boundaries. Aram and colleagues measure the cooling influence of a 125-hectare urban park through mobile observations and perceived thermal comfort, demonstrating that distance from the park is associated with changes in air temperature, physiological equivalent temperature and bodily perception. The park is therefore a thermal field rather than an isolated polygon. 

The Ecological City Is an Argument: Green Space, Knowledge and Territorial Authority in Dakar, Kinshasa, Cairo, Tunis, Nairobi and Cape Town (Cissé, Mvemba, Aly, Ben Salem, Odhengo, Stålhammar) · LAPIEZA LAB · Anto Lloveras · Socioplastics · 2026

Urban nature becomes politically real only through the systems that make it visible, valuable and governable. A tree canopy captured by satellite, a market garden defended by cultivators, a colonial square conserved as landscape heritage, a park rendered inaccessible by a flyover, a Medina courtyard retained as climatic memory and a biodiversity hotspot disputed by planners are all called “green”, yet they belong to profoundly different epistemic and territorial orders. The African urban cases assembled here make this distinction unavoidable. Cissé and colleagues quantify Dakar’s green-space decline between 1990 and 2022, demonstrating a conversion from vegetated land toward built and bare surfaces; Badiane, Thiaw and Deme complicate the same city by showing that particular green spaces persist as colonial and postcolonial civic inheritances whose value cannot be inferred from land-cover percentage. 

Theory from Irreducible Cities: African Urban Epistemology, Comparison and Situated Knowledge (Watson, Pieterse, Robinson, Anderson, Okyere, Simwanda, Odendaal) · LAPIEZA LAB · Anto Lloveras · Socioplastics · 2026

A city becomes theoretically consequential when it is permitted to contradict the concepts through which it is first observed. The enduring asymmetry of urban studies has not been simply that African cities were underrepresented, but that they were frequently positioned as empirical deviations from theories generated elsewhere: sites of informality, infrastructural deficit, incomplete modernity or delayed development whose explanatory grammar arrived in advance. Vanessa Watson’s “clash of rationalities” makes the epistemic structure of this problem visible. Planning systems built from techno-managerial, marketised and often inherited institutional forms encounter populations whose livelihoods, spatial practices and survival strategies operate through different rationalities; the resulting conflict cannot be understood as a temporary failure to implement an otherwise universal planning model.