The Inca Empire There are many empires, but three big ones are the Mayan, Incan, and the Aztec. The Incan Empire is better than the Mayan and Aztec because of their geography, farming, religion, social, classes, and achievements. The first reason they are better than the other empires because of their farming methods. The Incas invented terrace farming. This is the process of creating flatlands by building steps into the land down the mountainside (considering the fact they lived on a mountain).