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Abstract The relationship between humans and land environment within historical settlements reflects the intricate interplay between human societies, their construction activities, and the specific geographical contexts. Inadequate research into this relationship hinders a comprehensive understanding of the social spatial intricacies inherent in historical settlements. This paper adopts the theoretical framework of complex adaptive system and takes Shawan Ancient Town in Guangfu area of China as an example. Under the geographical background of sustainable land growth in the coastal zone, this study analyzed the subtle changes in the relationship between people and land during the historical construction, and the key findings of the investigation are threefold: (1) Land resources play a central role in the construction of human-land relationships in historical settlements. The geographical environment and social institutions serve as configuring factors in the formation and evolution of human-land relationships. These factors collectively determine the formation and evolution of human-land relationships. (2) Social space emerges as a pivotal manifestation of the human–environment relationship in historical settlements, transcending mere physical dimensions. Consequently, a holistic study of this relationship necessitates a comprehensive exploration not only of spatial configurations but also of the intricate interconnections among social bonds, structural formations, societal order, and settlement spatiality. (3) Drawing on the framework of complex adaptive systems theory, the study disentangles intricate elements within the human-land relationship of historical settlements. It distills and examines the manifestations of four intricate adaptive capacities—namely aggregation, non-linearity, flow, and diversity—alongside the mechanisms of tags, internal models, and fundamental building blocks. It is believed that the study of historical settlements in coastal areas needs to grasp the invariable social-spatial objects such as geographical environment, land form, local beliefs. Take it as a clue to sort out how other elements of change have iterated and transformed in the process of historical evolution, such as the rise and fall of families, land ownership changes and social class evolution. This paper explores the value connotation of historical settlements from the perspective of dialectic thinking of change and invariance with CAS theory, which has theoretical significance for protection of settlement's human-land relationship from the perspective of "social-spatial".
Zhang et al. (Wed,) studied this question.