Both Bolivian oral traditions and a commentary compiled by the conquest-era Spanish historian Inca Garcilaso de la Vega recount that the movement was ordered by the chieftain of the Ayares, Manco Kapac, and his sister-wife, Mama Ocllo. According to the legendary story, the couple claimed to be children of the sun god, who instructed them to civilize the surrounding backward tribes. They set out from the Island of the Sun in Lake Titicaca with a golden staff, which guided them even- tually to a mountain near Cuzco in modern-day Peru. There the divine pair established their kingdom. The Ayares, who were Aymara speakers, intermarried with the more primitive regional Indian communities of the Quechua language family and adopted the Quechua language. Over time, the Cuzco Quechua, whose name means “people from the tropical lands,” ﬂourished and developed into the powerful Indian nation that became known as the Inca. Following this interpretation, the emerging imperial state of the Quechua-speaking Inca was derived from the preceding political and socioeconomic systems of the Aymara and Tiwanakan civilizations. Inca Sinchi Roca, the successor of Manco Capac, is believed to have divided the empire into four geographical sections that were ruled by viceroys and were internally further divided into provinces and sub- provinces ruled by provincial ofﬁcials. The subprovinces were made up of several allyus, headed by curacas, who were either elected or the hereditary chiefs of the conquered governments. At the next lower level of organization were the tribes and the villages, which consisted of 100 families, and at the very bottom were groups of 10 families served by a headman. In this manner, the Inca adopted and perfected the admin- istrative system of the Aymara and transformed it into a complex but effective system of imperial control.