Plants produce a considerable number of structures of one kind, like leaves, flowers, fruits, and seeds, and this reiteration is a quintessential feature of the body plan of higher plants. But since not all structures of the same kind produced by a plant are identical—for instance, different branches on a plant may be male or female, leaf sizes in the sun differ from those in the shade, and fruit sizes can vary depending on patterns of physiological allocation among branches—a single plant genotype generally produces a multiplicity of phenotypic versions of the same organ.

Multiplicity in Unity uses this subindividual variation to deepen our understanding of the ecological and evolutionary factors involved in plant-animal interactions. On one hand, phenotypic variation at the subindividual scale has diverse ecological implications for animals that eat plants. On the other hand, by choosing which plants to consume, these animals may constrain or modify plant ontogenetic patterns, developmental stability, and the extent to which feasible phenotypic variants are expressed by individuals.

An innovative study of the ecology, morphology, and evolution of modular organisms, Multiplicity in Unity addresses a topic central to our understanding of the diversity of life and the ways in which organisms have coevolved to cope with variable environments.

A unique contribution to the archaeological literature on the Southwest, Seventeenth-Century Metallurgy on the Spanish Colonial Frontier introduces a wealth of data from one of the few known colonial metal production sites in the Southwest. Archaeologist Noah H. Thomas draws on and summarizes ten seasons of excavation from the Pueblo of Paa-ko to provide a critical analysis of archaeological features and materials related to metal production during the early colonial period (AD 1598–1680). Extrapolating from the data, Thomas provides a theoretical interpretation of these data that is grounded in theories of agency, practice, and notions of value shaped in culture. In addition to the critical analysis of archaeological features and materials, this work brings to light a little-known aspect of the colonial experience: the production of metal by indigenous Pueblo people.

Using the ethnography of Pueblo peoples and seventh-century European manuals of metallurgy, Thomas addresses how the situated agency of indigenous practitioners incorporated within colonial industries shaped the metallurgy industry in the Spanish colonial period. The resulting analysis investigates how economic, technical, and social knowledge was communicated, contested, and transformed across the social and cultural boundaries present in early colonial communities. Viewing these transformations through an ethnohistorical lens, Thomas builds a social and historical context within which to understand the decisions made by colonial actors at the time.