INKAS DIDN'T LEAVE ANY SCRIPT.

The INKAS and the other Peruvian people did not leave us ANY CODICES - historical, astronomical
or religious - or any dated monuments. Nor did they have ANY SCRIPT of a hiero-graphical kind, which could have been deciphered.

This situation hangs together with the fact that the Peruvians, whose political development was so advanced, were very conscious of the DEEPER ABSTRACT IDEAS underlying their social and
political organization, its religious justification and its functioning through time, but WERE LESS
WORRIED ABOUT OF AN ARTICULATED ICONOGRAPHIC LANGUAGE SYSTEM.

The INKAS of ancient Peru KEPT RECORDS MATHEMATICALLY  on QUIPUS. They were devises made of cords whose LENGTH, THICKNESS, COLOUR, and KNOTS denoted different values. Knots of natural - colored cord represented numbers : single knots for tens, double for hundreds, and triple for thousands.
QUIPUS were also used to TRANSMIT MESSAGES, WHICH WERE CODED INTO NUMBERS.

As imperial organizers, these WARRIOR PEOPLE took over a series of ancient cultures and reshaped
the roads, religion, and government they inherited.
The INKA excelled at engineering. The mathematical structure of their minds made them built roads
3, 250 miles (5, 200 kilometers) long, piped irrigation water through mountain tunnels, hung suspension bridges across Andean canyons.

The INKA also created a rigid caste system. From one end of the Andes to the other, the empire ran
FACTORIES for making all the cloths, ceramics and gold ornaments required for ceremonial use and for the nobility. The Inka also exacted tribute from everybody they conquered, keeping track of their
accounts by the QUIPU.

In this Peruvian society everyone knew his place.