In aztec society, a person’s social class was fixed; rank was determined at birth, and there was no possibility of moving up the social hierarchy.

Actually, that's false. The Aztecs had two distinct social classes: the macehualles or commoners, and the nobility or pilli. The ranks were not determined by birth as one could rise from the macehualles to pilli through great skill and bravery during war

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.

the pogroms became known as kristallnacht, the "night of shattered glass," for the shattered glass from the store windows that littered the streets. the morning after the pogroms 30,000 german jewish men were arrested for the "crime" of being jewish and sent to concentration camps, where hundreds of them perished.