reaching Cuzco where they established Hurin Cuzco, or the first dynasty of the Kingdom of Cuzco. In a third origin myth, an Inca sun god told his wife that he was lonely. She proposed that he create a civilization to worship him and keep him company. He saw this as a wise plan and carried it out. The Inca were born from Lake Cusco and populated the Andes and worshiped their sun god. In the last origin myth, Manco Cápac, who was the son of the sun, and his sister Mama Occlo, the daughter of the moon, were sent by the sun to look for a place to build an empire. They were to tell when they were at the right place by carrying a special rod with them at all times. Wherever the rod sank into the ground, this was where they were to create a new city. The rod sank into the ground in Cuzco. The knowledge of these myths is due to oral tradition since the Incas did not have writing. Manco Cápac, who became the leader of his tribe, probably did exist, despite lack of solid evidence. The archeological evidence seems to indicate that the Inca were a relatively unimportant tribe until the time of Sinchi Roca, also called Cinchi Roca, who is the first figure in Inca mythology whose existence can be supported historically. The Inca people began as a tribe in the Cusco area around the 12th century. Under the leadership of Manco Cápac, they formed the small city-state of Cusco Quechua Qosqo. In 1438, under the command of Sapa Inca (paramount leader) Pachacuti, whose name meant "world-shaker", they began a far-reaching expansion. The land Pachacuti conquered was about half the Andes mountain range. Pachacuti reorganized the kingdom of Cusco into an empire, the Tahuantinsuyu, a federalist system which consisted of a central government with the Inca at its head and four provincial governments with strong leaders. The leaders were Chinchasuyu (NW), Antisuyu (NE), Kuntisuyu (SW), and Qullasuyu (SE). Pachacuti is also thought to have built Machu Picchu, either as a family home or retreat. Pachacuti would send spies to regions he wanted in his empire who would report back on their political organization, military might and wealth. He would then send messages to the leaders of these lands extolling the benefits of joining his empire, offering them presents of luxury goods such as