divergent path, with some tlatoani of recently conquered or otherwise subordinated altepetl becoming replaced with stewards charged with collecting tribute on behalf of the Huetlatoani rather than simply replacing an old tlatoque with new ones from the same set of local nobility. Yet the Huey tlatoani was not the sole executive. It was the responsibility of the Huey tlatoani to deal with the external issues of empire; the management of tribute, war, diplomacy, and expansion were all under the purview of the Huey tlatoani. It was the role of the to govern a given city itself. The Cihuacoatl was always a close relative of the Huey tlatoani; Tlacaelel, for example, was the brother of Moctezuma I. Both the title "Cihuacoatl", which means "female snake" (it is the name of a Nahua deity), and the role of the position, somewhat analogous to a European Viceroy or Prime Minister, reflect the dualistic nature of Nahua cosmology. Neither the position of Cihuacoatl nor the position of Huetlatoani were priestly, yet both did have important ritual tasks. Those of the former were associated with the "female" wet season, those of the latter with the "male" dry season. While the position of Cihuacoatl is best attested in Tenochtitlan, it is known that the position also existed the nearby altepetl of Azcapotzalco, Culhuacan, and Tenochtitlan's ally Texcoco. Despite the apparent lesser status of the position, a Cihuacoatl could prove both influential and powerful, as in the case of Tlacaelel. Early in the history of the empire, Tenochtitlan developed a four-member military and advisory Council which assisted the Huey tlatoani in his decision-making: the ; the ; the ; and the . This design not only provided advise for the ruler, it also served to contain ambition on the part of the nobility, as henceforth Huey Tlatoani could only be selected from the council. Moreover, the actions of any one member of the council could easily be blocked by the other three, providing a simple system of checks on the ambition higher officials. These four Council members were also generals, members of various military societies. The ranks of the members were not equal, with the and having a higher status than the others. These two Councillors were members of the two most prestigious military societies, the ("shorn ones") and the ("Otomies"). The , the relatives of the former Huey tlatoani, will choose the next Huey tlatoani from