In the 4th century, while on the European continent continues the dismemberment of the Roman Empire through the struggles with the barbarians; America in bloom Aboriginal cultures, namely: in the center of Mexico, Teotihuacan and the Toltecs; in Yucatan, the maya; in Central America, the quiche. From the 11th century, era of consolidation of feudalism in the greater part of Europe, with the exception of Spain, absorbed by their wars against the Moors, the incas, on the basis of previous cultures, are expanded through the current territories of Peru, Bolivia, Ecuador, northern Chile and Argentina. The Aztecs in the 13th century, reach a hegemonic position within Mexico dominate neighbouring Aboriginal people. In the 15th century the Aztecs dominate the Valley of Mexico; in power was Montezuma; the Mayans were in full decline; the incas are found in the time of flowering of the Empire. Archaeologists and paleontologists are in agreement that the Amerindians they came from elsewhere and settled in the Americas. Do not exist in America vestiges of primitive human beings where the indigenous population had been able to proceed, and therefore assumes that the first settlers moved from Asia to America, probably by the Bering Strait. This immigration began apparently, finished the glacial periods.
Immigrants belonged undoubtedly to the Mongolian ethnic group, and therefore, the primitive Indians of America would be related with the Chinese. The immigrants occupied North America, then the Centre and finally South. They were hunters and in his nomadic existence ranged from a few counties to others in search of edible plants and hunting. It ignores how or when started to cultivate maize, the only cereal that knew. The emergence of agriculture brought an end to nomadism and cemented social structures more sophisticated, beginning to emphasize cultural manifestations. The Aztecs: in Mexico not has been able to discover your most ancient culture, but has been able to delimit a very primitive period which has received the name of archaic period.