The Inkas, more commonly known as the Incas, established one of the greatest civilizations in pre-Columbian America. Their empire, called Tawantinsuyu, meaning "The Land of Four Quarters," stretched along the Andes Mountains from present-day southern Colombia through Ecuador, Peru, Bolivia, northern Chile, and northwestern Argentina. Although the empire lasted for less than a century before the arrival of the Spanish in the sixteenth century, it represented an extraordinary achievement in political organization, administration, agriculture, engineering, and social integration. The Inka civilization emerged from earlier Andean cultural traditions and transformed them into a highly centralized imperial system. The Inkas originated as a small tribal group in the Valley of Cuzco in present-day Peru. According to their traditional legends, they were descendants of the Sun God, Inti, and were led by the divine ruler Manco Capac, who founded the city of Cuzco. Although these myths strengthened the legitimacy of the ruling dynasty, archaeological and historical evidence indicates that the Inkas gradually expanded their influence through warfare, alliances, and administrative reforms. The remarkable expansion of the empire began during the reign of Pachacuti Inka Yupanqui in the fifteenth century. He reorganized the kingdom into an empire and laid the foundations for an efficient administrative structure. His successors, especially Topa Inka Yupanqui and Huayna Capac, extended Inka rule over vast territories. The empire was divided into four administrative regions or suyus, namely Chinchaysuyu, Antisuyu, Collasuyu, and Cuntisuyu, all connected to the capital city of Cuzco. These four regions symbolized both geographical and political unity. The empire was governed by the Sapa Inka, regarded as the son of the Sun God and the supreme political, military, and religious authority. His commands carried divine authority, and loyalty to the emperor was considered both a political duty and a religious obligation. The administrative machinery of the Inka Empire was one of the most sophisticated among ancient civilizations. The empire was governed through a hierarchical bureaucracy consisting of governors, provincial officials, local chiefs known as curacas, and inspectors who ensured that imperial policies were implemented efficiently. The Inkas retained many local rulers in their administrative positions provided they accepted imperial authority and paid tribute. This flexible approach reduced resistance and facilitated integration of conquered peoples. The decimal administrative system formed the backbone of governance. Households were organized into groups of ten, fifty, one hundred, five hundred, one thousand, and ten thousand, each supervised by officials responsible for taxation, labor organization, and census maintenance. Such systematic organization enabled the state to mobilize labor, collect resources, and maintain order throughout the empire. Unlike many ancient civilizations, the Inkas had no developed writing system. Instead, they used quipus, consisting of colored cords with knots of different sizes and positions, to record numerical information related to population, taxes, agricultural production, military supplies, and state resources. Special officials known as quipucamayocs