such as Michel Graulich (2002) and Susan D. Gillespie (1989) maintained that the difficulties in salvaging historic data from the Aztec accounts of Toltec history are too great to overcome. For example, there are two supposed Toltec rulers identified with Quetzalcoatl: the first ruler and founder of the Toltec dynasty and the last ruler, who saw the end of the Toltec glory and was forced into humiliation and exile. The first is described as a valiant triumphant warrior, but the last as a feeble and self-doubting old man. This caused Graulich and Gillespie to suggest that the general Aztec cyclical view of time, in which events repeated themselves at the end and beginning of cycles or eras was being inscribed into the historical record by the Aztecs, making it futile to attempt to distinguish between a historical Topiltzin Ce Acatl and a Quetzalcoatl deity. Graulich argued that the Toltec era is best considered the fourth of the five Aztec mythical "Suns" or ages, the one immediately preceding the fifth Sun of the Aztec people, presided over by Quetzalcoatl. This caused Graulich to consider that the only possibly historical data in the Aztec chronicles are the names of some rulers and possibly some of the conquests ascribed to them. Furthermore, among the Nahuan peoples the word Tolteca was synonymous with artist, artisan or wise man, and Toltecayotl, literally 'Toltecness', meant art, culture, civilization, and urbanism and was seen as the opposite of Chichimecayotl ('Chichimecness'), which symbolized the savage, nomadic state of peoples who had not yet become urbanized. This interpretation argues that any large urban center in Mesoamerica could be referred to as Tollan and its inhabitants as Toltecs – and that it was a common practice among ruling lineages in Postclassic Mesoamerica to strengthen claims to power by asserting Toltec ancestry. Mesoamerican migration accounts often state that Tollan was ruled by Quetzalcoatl (or Kukulkan in Yucatec and Q'uq'umatz in Kʼicheʼ), a godlike mythical figure who was later sent into exile from Tollan and went on to found a new city elsewhere in Mesoamerica. According to Patricia Anawalt, a professor of anthropology at UCLA, assertions of Toltec ancestry and claims that their elite ruling dynasties were founded by Quetzalcoatl have been made by such diverse civilizations as the Aztec, the Kʼicheʼ and the Itza' Mayas. While the skeptical school of thought does not deny that cultural traits of a seemingly central