THE INCAS HAVE NO CLASS OF TRADERS AT ALL.

The Inca Empire is the only one advanced civilization in the Old and New Worlds that traders did not exist within its boundaries and the verticality of its power did not let commerce with means of financial gains develop. The language that they use to obtain what they need to survive at that high altitude was sharing and everything produced in the land in a vertical way was distributed among its subjects in a right amount making no one left unattended.
In the Old World, on the contrary, the horizontal way of commerce was common. By the second millennium BC, former Cyprus had become a major Mediterranean player by ferrying its vast copper resources to the Near East and Egypt. These regions , in turn, were very wealthy due to their own natural resources such as papyrus and wool. Phoenicia, famous for its seafaring expertise, commercialized its valuable cedar wood and linens dyes all over the Mediterranean. China prospered by trading Jade, spices, and later, silk. Britain did the same with its abundance of tin. In the absence of roads, the most efficient way to transport goods from one place to another was by sea.
During the time Christopher Columbus, his birthplace, Genoa was one of Europe's largest cities on the Mediterranean Sea and the largest Sea Port in Italy, also the capital city of the Ligurian Region and the 6th largest city in Italy. Its massive shipyards and its solid financial reputation goes back to the Middle Ages. The Bank of Saint George, founded in 1407 is among the oldest in the World and it played an important role in the financial support given to the Kings in order to find new ways to get rich through the commercialization of their goods. When they arrive to the American lands they really thought they were in India. With their arrival, an old branch of human race mixed with a pure and clean one formed with different way of life. Diseases from the Old World came with them and killed the inhabitants of the new world in a massive way since they never had it and did not have enough time to develop immunity in their bodies like the Europeans did. They already had experienced numerous plagues because of the overcrowded cities, lack of planning, lack of sanitation and an enormous greed of becoming rich.
To the massive Inca Empire, the largest in South America, that stretched a total length of 2,485 miles, essentially the length of the Continent between the Ancasmayo River at the border of modern day Colombia and Ecuador, all the way to Maule River in modern day Chile, the greatest mystery in the eyes of the first Europeans that landed in American lands and couldn't comprehend was the superb economy that the people of the New World had without a trading class and market places to lean on.
When the Europeans arrived to the lands of the Incas they were astonish and felt intimidated when they saw the enormous Empire the Incas had without leaning in the language of commerce and marketplaces they were used to.
The Incas were able to incorporate lands from today's Colombia, Chile, Bolivia, Ecuador, Argentina, and Peru and connect all of them by a vast highway system across the Andes Mountain tops and down to the shoreline whose complexity rivaled any in the Old World, and has never been surpassed.
The superb knowledge in planning and architectural designs made them master builders and experienced land planners, capable of extremely sophisticated Mountain agriculture, and able to built cities around to important locations in the high altitudes of the Andes mountains to match the purpose of its design.
They elders spent most of its time instructing the young generations in the continuity of their knowledge and understanding of the cosmological forces that governed their universe. The elders specialized them in planning the agricultural uses of newly-absorbed areas according to the mountain seasons. Also they learned agricultural methods and applied the instruction in building terraced farms on the mountainsides whose crops - from potatoes and maize to peanuts and squash- were carefully chosen to thrive in the average temperatures for different altitudes. Timing was so important to them.
Very few in today's world realize how much we owe to the Incas. Very few appreciate that they gave to the Old World so many varieties of potatoes and corn and such useful herbs from which good remedies were obtained to combat common illnesses.