Ancient civilizations-2

Archaeological unity of the Postclassic

The Postclassic period of Meso-American archaeology generally is a period characterized by considerable regionalism combined with a certain degree of uniformity. To a great extent, the latter was the product of the large states and extensive trade networks centred in the central plateau region. The Early Postclassic in some areas may be described as a continuation of the Late Classic; on the Gulf coast, for example, sites like El Tajín continued to be occupied, while in the Valley of Oaxaca (although Monte Albán was abandoned) the Zapotec tradition continued with the new centre at Mitla. In other areas, new styles either began or reached their climactic development, such as the Mixteca–Puebla style in painting, ceramics, and metallurgy, which evolved either in western Oaxaca or, more probably, at Cholula in Puebla. On the Guatemalan Pacific piedmont and in Tabasco, two specialized ceramic traditions (both of which began in Late Classic times) evolved: (1) plumbate (so called because of its slip, which had an unusually high iron content in the natural clay that fired to a lead-colour glaze); and (2) Fine Orange (so called because of its fine-grained, temperless paste). Wares of these two styles were widely traded.

The unity of the Postclassic consisted primarily of the diffusion of religious ideology, particularly the sun god–warfare–sacrificial complex and of the related institutional development such as the military orders (the latter probably originated at Classic Teotihuacán). This ideology clearly originated in central Mexico, at either Cholula or Tula or both. The specific artistic style of representation of the themes in painting and sculpture spread as well. Along with this was diffused a specific style of representation of the social calendar and writing generally and much greater emphasis on the 52-year cycle. The specific style most probably originated at Cholula.

In the highland areas of Meso-America the Late Postclassic was a period of maximum population growth. The Early Postclassic was, however, the period of maximum expansion of sedentary peoples on the northern frontier, probably the product of minor changes in climate as a result of increased rainfall. This frontier retracted substantially in Late Postclassic times, possibly because the rainfall decreased. This was perhaps the major factor in the precipitate arrival of barbarous tribes into the plateau, as the annals state.

The Postclassic, over large areas of the lowlands, on the other hand, was strikingly different. One of the most intriguing problems of Meso-American archaeology is the peculiar sequence of events in the lowland Maya area. At the time of European contact much of the northern portion of Yucatán was well settled. A narrow band of densely settled country also extended along the east coast south to modern Belize City and along the entire length of the west coast (where it joined another area of substantial settlement in the south Gulf coast). Most of the heart of the peninsula, the department of Petén in Guatemala, and large portions of the states of Campeche and Quintana Roo in Mexico (the most densely settled portion of the Classic Maya territory) were virtually abandoned.

One of the major problems of Meso-American archaeology is the explanation of this massive population decline. The immediate causes are clear: it must have been the product of migrations out of the area or a set of internal factors that caused a decline in situ or both. Various hypotheses as to processes and causes have been suggested. These may be grouped in the following categories: natural disasters (earthquakes, famines, epidemics, and hurricanes have all been suggested); ecological processes (primarily the deterioration of the natural environment by overintensification of land use in response to population pressure); and sociopolitical processes (internal warfare, invasion from outside, peasant revolts, breakdown of critical trade networks). Some of these hypotheses are clearly derivations from others or are not explanations but rather are descriptions of events that were produced by other processes. It seems certain that the causes were multiple and in some way related. Of great interest is the fact that at least one other lowland area, the Pacific Coastal Plain of Guatemala, experienced a comparable Postclassic decline. William T. Sanders