Finally, the historical background of the Mayan civilization also explains the reason why it is not uniform. It took thousands of years for the Maya civilization to emerge from around 1200 BC until it was destroyed by Spanish colonists in the 16th century. The Mayan region in its heyday was divided into hundreds of city-states, but these city-states were traditionally part of the same cultural circle in terms of language, writing, religious beliefs, and customs. The Mayan civilization, along with the Inca civilization and the Aztec civilization, was one of the three major civilizations in the Americas, but its influence never formed a unified and powerful empire .