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10 Ancient civilization ((((There have been several points of contention,…

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        The continents of North and South America were "discovered" by the European civilizations in the late 15th century A.D., but people from Asia arrived in the Americas at least 15,000 years ago
        
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        The Inca civilization was the largest civilization in the Americas when the Spanish conquistadors arrived in the early 16th century. Known for their unique writing system (called the quipu), a magnificent road system, and the lovely ceremonial center called Machu Picchu, the Inca also had some pretty interesting burial customs and an amazing ability to build earthquake-proof buildings.
- - - - One of the largest ceremonial centers is the Caral site. It includes extensive residential occupation and it is located some 23 km (14 mi) inland from the mouth of the Supe river as it flows into the Pacific. The site covers ~110 ha (270 ac) and contains six large platform mounds, three sunken circular plazas, and numerous smaller mounds. The largest mound is called Piramide Mayor, it measures 150x100 m (500x328 ft) at its base and is 18 m (60 ft) high. The smallest mound is 65x45 m (210x150 ft) and 10 m (33 ft) high. Radiocarbon dates from Caral range between 2630-1900 cal B.C.E.
        All of the mounds were built within one or two building periods, which suggests a high level of planning. The public architecture has stairs, rooms, and courtyards; and the sunken plazas suggest society-wide religion.
- - - - There have been several points of contention, most conspicuously leading to the two different names, but perhaps the most basic difference between the two interpretive structures is one that at the moment can only be hypothesized: what drove mobile hunter-gatherers to build monumental structures.
    - - The Olmec civilization flourished on the gulf coast of Mexico and constructed the first stone pyramids in the North American continent, as well as the famous stone "baby-faced" head monuments. The Olmec had kings, built enormous pyramids, invented the Mesoamerican ballgame, domesticated beans, and developed the earliest writing in the Americas.
        
        2.Olmec civilization
    - - In direct competition with Tiwanaku was the Wari (also spelled Huari) state. The Wari state was located in the central Andes mountains of Peru, and their impact on the succeeding civilizations is remarkable, seen at sites like Pachacamac.
        
        The best-known civilization in the Americas, I'll wager, is the Aztec civilization, largely because they were at the height of their power and influence when the Spanish arrived. Warlike, intractable, and aggressive, the Aztecs conquered much of Central America. But the Aztecs are so much more than simply warlike.
- - - - Each site contains between one and six platform mounds ranging in volume from about 14,000–300,000 cubic meters (18,000–400,000 cubic yards). The platform mounds are rectangular terraced stone structures built with 2–3 m (6.5-10 ft) high retaining walls filled with a combination of soil, loose rocks, and woven bags called shicra which contained stones. The platform mounds vary in size between and within sites. At the top of most of the mounds are walled enclosures arranged to form a U-shape around an open atrium. Stairs lead down from the atria to sunken circular plazas ranging from 15–45 m (50–159 ft) across and from 1–3 m (2.3–10 ft) deep.
      - The Norte Chico/Caral Supe archaeological region has a ceremonial landscape that is so densely packed that people at the larger centers could see other larger centers. Architecture within the smaller sites also includes complex ceremonial landscapes, including numerous small scale ceremonial structures among the monumental platform mounds and sunken circular plazas.
- - - - There are at least 30 archaeological sites that are ascribed to this society, each with large-scale ceremonial structures, with open plazas. The ceremonial centers each span several hectares, and all are located within four river valleys, an area of only 1,800 square kilometers (or 700 square miles). There are numerous smaller sites within that area as well, who have complex ritual features on a smaller scale, that scholars have interpreted as representing places where elite leaders or kin groups could meet privately.
- - - - The Mississippian culture is a term used by archaeologists to refer to cultures inhabiting the length of the Mississippi River, but the highest level of sophistication was reached in the central Mississippi River valley of southern Illinois, near present-day St. Louis, Missouri, and the capital city of Cahokia. We know quite a bit about the Mississippians in the American southeast because they were first visited by the Spanish in the 17th century.