The Preclassic period in Maya history stretches from the beginning of permanent village life c. 1000 BC. until the advent of the Classic Period c. 250 AD, and is subdivided into Early (prior to 1000 BC), Middle (1000-400 BC), and Late (400 BC-250 AD). Major archaeological sites of this period include Nakbe, Uaxactun, Seibal, San Bartolo, Cival, and El Mirador in Guatemala; Cahal Pech, Blackman Eddy, and Cerros in Belize; and Calakmul, Yaxnohcah, Ichkabal, Komchen, and Xocnaceh in Mexico.
The Southern Maya area is believed to have been important to the rise of Maya civilization, with sites such as Kaminaljuyu, Izapa, Monte Alto, and Paso de la Amada.
The Middle and Late Preclassic periods in the Maya lowlands witnessed the development of urbanism, monumental architecture, Maya script, and political institutions including divine kingship.
Maya society underwent a series of profound transformations between c. 100 AD and 250 AD, which resulted in the cessation of monumental building at many Preclassic cities and the inferred collapse of their political and economic systems, often characterized as the "Preclassic Collapse."
The roots of Maya civilization remain obscure, although broad parameters are increasingly well known. Paleo-environmental data indicate the presence of agriculturalists in the Maya lowlands by c. 3000 BC, although permanent agricultural settlements seem to have developed only gradually. Analysis of bones from early Maya grave sites indicate that, although maize had already become a major component of the diet (under 30% at Ceullo, Belize) by this time, fish, meat from game animals, and other hunted or gathered foods still made up a major component of the diet. Along with the gradual development of agriculture, basic forms of pottery began to appear, with simple designs and some slipped vessels. Around this time, the Olmec culture began to emerge in nearby Tabasco, granting the early Maya an important trading partner and beginning a period of prolonged contact that would have profound effects on Maya society.