Alejandro Fábregas-Tejeda

Humans are social beings. However, we are not alone in the realm of social reality; we share this space with diverse entities, including more than just animals. The term "social" has recently been applied to describe the collective behaviors of microorganisms and plants, as well as interactions among parts and groups of organisms. Therefore, there is a need to develop a framework that enables the study of social phenomena in a clearer and less restrictive manner. In this thesis, I lay the groundwork for such a framework by describing the basic building blocks of social systems and their implications in the study of social behavior. This project necessitates breaking down disciplinary boundaries between the biological, cognitive, and social sciences to provide a more comprehensive perspective on the social phenomenon. In Part I, I review recent proposals that describe social systems based on interactions. I argue that these models can be extended to other interactive systems beyond animals, questioning the limits of the standard view of social systems. Also, by challenging an argument that supports a gap between humans and nature, I advocate for a broader understanding of social reality that includes both human and nonhuman beings. In Part II, I present a new framework for studying social systems consisting of three fundamental building blocks: interactions, relationships, and social units. I argue that interactions are vital components of social systems, highlighting their dynamic and entwined nature. Relationships, arising from distinctive patterns of interactions sensitive to the identity of the individuals, play a crucial role in these systems and encompass both objective and subjective components. Lastly, I develop an account of social units as cognitively autonomous individuals, drawing on biogenic approaches to cognition. Thus, I propose that a social system emerges when cognitively autonomous individuals (social units) engage in repeated interactions and form relationships. In Part III, I apply this framework to two entities that are subjects of contemporary debate: groups and plants. I argue that both groups and plants are potential social units. Specifically, plants interact repeatedly and demonstrate the ability to differentiate between individuals, providing evidence of their capacity to form social relationships. This framework serves as a guide for studying the social behavior of these entities and offers valuable insights into their interactive systems. Overall, this expanded framework establishes connections between social phenomena across different taxa and levels of organization, facilitating comparative investigations. It introduces new perspectives on social behavior, encourages interdisciplinary collaboration, and broadens our understanding of multi-species interactions.