Before the Spanish                      Mexico was occupied by a large number of Indian groups with very                      different social and economic systems.   In general the tribes in the north                     were relatively small groups of hunters and gatherers who roamed                     large areas of sparsely vegetated deserts and dry lands. These people                     are often called the Chichimecs, though they were a mixture of several                     cultural groups who spoke different languages.                      In the rest of the country the natives were agriculturists, which helped                     to support the more dense populations. Some of these tribes were the                     Maya of the Yucatan, Totonac, Huastec, Otomi, Mixtecs, Zapotecs,                     Tlaxcalans, Tarascans, and Aztecs. Some of these groups made                     advanced civilizations with fancy buildings and temples used for                     religious, political, and commercial purposes. The Mayan cities of                     Chichen Itza, Uxmal, and Palenque, the Aztec capital of Tenochtitlan,                     Tzintzuntzan of the Tarastec, and Monte Alban of the Zapotecs are a                     few examples.                      By 1100 AD the Toltecs had taken over a lot of central and southern                     Mexico and had built their capital at Tula in the Mesa Central. They                     also built the city of Teotihuacan kind of by present-day Mexico City.                     At about the same time, the Zapotecs had control of the Oaxaca                     Valley and parts of the Southern Highlands. The cities they built at                     Mitla and Monte Alban are still here today, though they were taken                     over by the Mixtecs prior to the arrival of the Spanish.                      When the Spanish came to central Mexico, the Aztecs con...