nobody knows
What caused the downfall of the Shang Dynasty was that Shang Zhou's army was defeated by the Zhou people at the Battle of Muye.
Died of a stroke
the empire was conquered by the moroccans in the late 1500s.
Domitian was murdered in a palace conspiracy by court officials.
Lack of food
nobody knows
gravity
because of religons
To this day, historians argue over what caused the Roman empire's downfall.
What caused the downfall of the Shang Dynasty was that Shang Zhou's army was defeated by the Zhou people at the Battle of Muye.
Muslim destroyed them
The downfall of Copan, a Mayan city in present-day Honduras, is believed to be due to a combination of factors such as overpopulation, environmental degradation, resource depletion, and possibly political instability. These factors led to a decline in agricultural productivity, social unrest, and eventually the abandonment of the city by its inhabitants.
Died of a stroke
Nothing caused Trajan's downfall. His reign ended when he died. He was ill in the last few months of his life and died of oedema.
the empire was conquered by the moroccans in the late 1500s.
They easily defeated Songhai's soldiers, who had only swords and spears while the enemy has gunpowder and cannons. :B