The two decades since the publication of Regional Perspectives on the Olmec have seen a great expansion of basic archaeological research in the “Olmec heartland” region of Mexico's southern Gulf lowlands as well as important new work on Formative period interregional interaction and its effects on local economies and polities. Olmec research, however, has not achieved as prominent a place as it merits in comparative research on the evolution of social complexity. In this essay I review this work and make some suggestions for future research directions.

Esta es una síntesis de las principales características organizativas de la secuencia de explotación de la obsidiana verde del yacimiento de La Sierra de Las Navajas (Pachuca), de las culturas teotihuacana, tolteca y azteca. El uso de este vidrio volcánico se relaciona directamente con el desarrollo económico, militar, religioso y comercial de las organizaciones estatales del centro de Mesoamérica. En cada etapa cultural, identificamos los principales procesos de manufactura de instrumentos, armas y objetos religiosos en los talleres del yacimiento, así como la permanencia de los mineros, talladores y cargadores. El análisis diacrónico de la organización de la explotación y la distribución de la obsidiana verde con el desarrollo de la sociedad, nos permite detectar los cambios substanciales en la estrategía de obtención de esta importante materia prima.

In the past 20 years, what were once considered specialized auxiliary subdisciplines or analytical approaches such as bioarchaeology, paleozoology, subterranean archaeology, and material culture studies have become central to all research due to refinements of their analytic tools. Meanwhile, building on earlier progress in epigraphy, work on the Classic period truly has become historical archaeology. These advances provide a much greater understanding of ancient Maya ecology, economy, and politics and insights into the details, not just trends, in culture history. Realization of this potential, however, is imperiled by problems in research design and interpretation. Project structures rarely allows for complete and independent application of these enhanced fields, while the traditional elements of ceramic classification and chronology have not kept pace. The erratic sample of both Maya lowland and highland regions needs to addressed, rather than glossed over by extrapolations or assumptions about interaction and expansionism. Institutional structures and financial limitations have led to many superficial studies masked by quasi-theoretical terminologies. Constructive solutions, most exemplified in some current projects, include the obligation to try to apply all available techniques and approaches. To make that feasible, larger projects should be fragmented into multi-institutional collaborations. Greater emphasis must be given to classifications and excavations that generate ceramic microchronologies. Above all, we must investigate the extensive unstudied or understudied regions. Finally, most challenging is the need to collectively confront academic structures that encourage rapid, incomplete studies and discourage more substantial publications and long term multi-institutional research.

This paper provides a reanalysis of a specialized biface workshop at Coyotlatelco-phase (a.d. 650–800) Teotihuacan excavated by Evelyn Rattray in 1979. Although Teotihuacan had already declined as a major center prior to this phase, the resident population was still being serviced by a variety of craftsmen, including knappers. The remains of an obsidian workshop at Hacienda Metepec give insight into workshop production within Epiclassic-period Teotihuacan. A single workshop produced between 4,700 and 8,700 projectile points similar in shape to San Marcos points. The homogeneous workmanship indicates a single knapper, perhaps over several years of effort.

The interpretation of craft activity in Mesoamerica has been hindered by difficulties in recognizing and defining the archaeological signatures associated with obsidian blade production and consumption. Theoretical advances and experimental approaches have improved our understanding, but few studies have investigated the role of obsidian blade production in craft activity using empirical data from archaeological assemblages. The present study addresses this problem by presenting an analysis of obsidian flakes and blades recovered from a workshop refuse context at Kaminaljuyu, Guatemala. Technological and use wear analyses suggest that core-shaping by-products in the form of irregular percussion and pressure blades were used in craft activity. Fine blades were underrepresented in the assemblage, suggesting that cores or blades left the workshop as finished goods. These analyses demonstrate that the actual behavior of artisans likely did not conform exactly to the dichotomous theoretical categories of production and consumption that archaeologists routinely use.

Aztec culture provides a gateway to Mesoamerican studies because it represents the connecting point between the pre-Hispanic past and the globalized present. Current research on the Aztecs comes from several disciplines: anthropology, history, art history, religion, and literature. The nearly fifty articles on the Aztecs published by Ancient Mesoamerica since its inception in 1990 encompass the various branches of Aztec scholarship. In this article we discuss major themes in recent scholarship on the Aztecs: environment and subsistence, settlement and demography, economy, politics, and social relations, ideology and masterworks, and interregional relations.