Original sentence: Aztec chronicles reported that human sacrifice began as an institution in the year "five knives", or 1484, under Tizoc.For the Spaniards who first met the Aztecs, human sacrifice was a striking feature of Aztec civilization.Human sacrifice was practiced throughout the Aztec empire and in particular at Tenochtitlan, the main Aztec city buried under today’s Mexico City.It is not known if the Aztecs engaged in human sacrifice before they reached the Anahuac valley and started absorbing other cultures.More extreme and public forms were used by the Maya.The excavation of the offerings in the main temple has provided some insight in the process, but the dozens of remains excavated are far short of the thousands of sacrifices recorded in popular accounts.The first human sacrifice reported by them was dedicated to Xipe Totec, a deity from the north of Mesoamerica.The practice of human sacrifice was widespread in Mesoamerican and South American cultures (during the Inca Empire).Under Tlacaelel's guidance, human sacrifice became important part of the Aztec culture, not only for religious reasons, but for political reasons as well.While the Maya made human sacrifices, the Aztecs practiced it on a particularly large scale, sacrificing human victims on each of their 18 festivities, one festivity for each of their 20-day months
Edited sentence: In America, while the Maya made human sacrifices, the Aztecs practiced it also.Starting with the Spanish Inquisition.The Spaniards were responsible for one of the most violent genocides in history.The excavation of the offerings in the main temple has provided some insight in the process, but the dozens of remains excavated.The population in Central Mexico decreased from 21,000,000 in 1520 to 1,500,000 in 1600.The practice of human sacrifice was widespread in different cultures worldwide.They had to justify their crimes, so they highlighted Aztecs, human sacrifice as a striking feature of Aztec civilization