In its general outlines the account here given of Aztec society and government at the time of the Discovery will probably hold true of all the semi-civilized communities of the Mexican peninsula and Central America. The pueblos of Mexico were doubtless of various grades of size, strength, and comfort, ranging from such structures as Zuni up to the city of Mexico. The cities of Chiapas, Yucatan, and Guatemala, whose ruins, in those tropical forests, are so impressive, probably belong to the same class. The Maya-Quiche tribes, who dwelt and still dwell in this region, were different in stock-language from their neighbours of Mexico; but there are strong reasons for believing that the two great groups, Mexicans and Mayas, arose from the expansion and segmentation of one common stock, and there is no doubt as to the very close similarity between the two in government, religion, and social advancement. In some points the Mayas were superior. They possessed a considerable literature, written in highly developed hieroglyphic characters upon maguey paper and upon deerskin parchment, so that from this point of view they stood upon the threshold of civilization as strictly defined.[145] But, like the Mexicans, they were ignorant of iron, their society was organized upon the principle of gentilism, they were cannibals and sacrificed men and women to idols, some of which were identical with those of Mexico. The Mayas had no conception of property in land; their buildings were great communal houses, like pueblos; in some cases these so-called palaces, at first supposed to be scanty remnants of vast cities, were themselves the entire "cities;" in other cases there were doubtless large composite pueblos fit to be called cities.