This paper seeks to define and discuss the nature, size, variety, ideology, and change in the polities of three regions of the Maya Lowlands: the Greater Peten, Central Yucatan (Río Bec/Chenes), and the Puuc Hills. Patterned variety is demonstrable on all levels of analysis and even within stylistic regions, within suggested regional states, and within sites.

Recent adjustments to the chronology of the northern Maya Lowlands have brought about a closer alignment of the decline of Terminal Classic/Early Postclassic Yucatecan polities with the collapse of the southern Maya states. The collapse of the entire Classic-period societal structure throughout the lowlands can now be compressed into a 200- or 250-year period and seen as a progressive chain of events that began in the south and culminated with the fall of Chichen Itza in the eleventh century. This new reconstruction has led us to propose eliminating the Early Postclassic period, the existence of which was based largely on a purportedly late occupation of Chichen Itza. We assign this final occupation of the Itza capital to the Terminal Classic period, which ended sometime in the eleventh century in the northern Maya Lowlands.

During the ninth century, many sites in the Southern Maya Lowlands were abandoned as elite and commoners felt the effects of the Classic-period Maya collapse. At the same time, sites to the north and east continued to flourish. Recent climatic data indicate that, at this time, much of the Maya area experienced a significant drought. However, this drought does not appear to have uniformly affected the entire region; instead, climate appears to have acted as a mosaic, shifting through time and space. It is hypothesized that one of the key factors responsible for these variable cultural trajectories is localized and regional climate change brought about through irregular anthropogenic deforestation. These changes, when coupled with an out-of-balance cultural system, may have served as a catalyst that sent some parts of the Maya world down the path to systems failure, while other zones were able—at least, temporarily—to adjust and continue.