The Incas empire was highly centralised, with the king representing the highest source of authority. Explain.

1. The largest of the indigenous civilizations in South America was that of the Quechuas or Incas in Peru. In the twelfth century the first Inca, Manco Capac, established his capital at Cuzco.
Expansion began under the ninth Inca and at its maximum extent the Inca empire stretched 3,000 miles from Ecuador to Chile.

2. The empire was highly centralised, with the king representing the highest source of authority. Newly conquered tribes wre absorbed effectively; every subject was required to speak Quechu, the langauge of the court. Each tribe was ruled independently by a council of elders, but the tribes as a whole owed its allegiance to the ruler.
At the sametime, local rulers were rewarded for their military co-operation. Thus, like the Aztec empire, the Inca empire resembled a confederacy, with the Incas in control. There are no precise figures of the population, but it would seem that it included over a million people.

3. Like the Aztecs, the Incas too were magnificent builders. They built roads through mountains from Ecuador to Chile. Their forts were built of stone slabs that were so perfectly cut that they did not require mortar. They used labour-intensive technology to carve and move stones from nearby rock falls.
Masons shaped the blocks, using an effective but simple method called flaking. Many stones weighed more than 100 metric tons, but they did not have any wheeled vehicles.

4. The basis of the Inca civilization was agriculture. To cope with the infertile soil conditions, they terraced hillsides and developed systems of drainage and irrigation.
It has been recently pointed out that in 1500, cultivation in the Andean highlands was much greater than what it is today. The Incas grew corn and potatoes, and reared llamas for food and labour.

5. Their weaving and pottery were a high quality. They did not develop a system of writing. However, there was an accounting system in place–the quipu, or cords upon which knots were made to indicate specific mathematical units. Some scholars now suggest that the Incas wove a sort of code into these threads.

6. The organisation of the Inca empire, with its pyramid-like structure, meant that if the Inca chief was captured, the chain of command could quickly come apart. This was precisely what happened when the Spaniards decided to invade their country.