because it is a myster
means to cause a downfall
He died prematurely.
Downfall in what? A bigger or more organised gang beat them. Which is not too difficult. Weeds do it.
His death. He was emperor until he died.
because they want something change to their government
The horses failed.
Yes, the compound noun 'downfall' is a common noun, a general word for a loss of power, prosperity, or status; a general word for the cause of such a loss; a general word for any downfall of any kind.
they died cause they shot each other
Nationalism, corruption, technological and economical downfall
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.
Tom Sever, an archaeologist, suggests that a combination of factors led to the downfall of the Mayan civilization, including environmental degradation, climate change, warfare, and political instability. He believes that these issues created a perfect storm that ultimately contributed to the collapse of the Maya civilization.
The main cause was the conquest by the Ottoman Turks in 1453.