Since trading was very important to the economy, the merchants traded many essentials that were hard to find in an Aztec's nearby neighborhood. In addition, the pochteas created the largest marketplace, which is Tianquiztli, kept the Aztec civilization evolving into greater acquirements. In conclusion, the people of the Aztecs had made great achievements to create a magnificent economy that kept Tenochtitlan a great economical city. .
While the Aztecs were beginning their economy, they started to deeply believe in many gods that ruled all parts of life that can affect everyone and could end the whole universe. Before Roman Catholicism invaded, the Aztecs' religion is believed to be polytheistic, meaning that these people worshipped multiple gods and goddesses. To provide many crops to support an economy and religion, they believed in gods and goddesses that were more in forms of nature, like the rain god, war god, sun god, and much more. Specifically, the Aztecs believed if they didn't please their gods, then the gods would return back a way of treating the Aztecs poorly and they will eventually all die. Since the people of the Aztecs feared of not pleasing the gods, they invented many inventions to prevent the world from ending. Everyone part of the Aztecs believed the universe is created fiver times and destroyed four times, so they made a 52-year ritual and solar calendar to keep the world alive. When the 52-year cycle ended, priests began to wait to see the constellation, Pleiades, over a crater in the Valley of Mexico; if the event happened, all Aztecs were saved. Moreover, to satisfy the gods even more, the Aztecs were widely known for human sacrificing their people to the gods to help save everyone. The sacrifice happened while the priests stood at top of a pyramid and stretching the victim, later cutting out its heart with a flint obsidian knife to put the heart in the "quahxixalli," the place to burn it with copal incense.