The most important reason for the collapse of Rome was the failure to actually integrate what they conquered. When Roman soldiers conquered new lands, it was rare that they ever attempted to force their culture, ideals, or laws upon the natives and barbarians. Thus, when the Empire began suffering internal struggles, the natives they had conquered decided to take action, which lead to the swift collapse by barbarian invasion from all sides. It's hard to pick a LEAST important reason, seeing that there were many of them, but I suppose a contender would most likely be the common refusal of the Empire to even acknowledge that barbarians were rising. On the outer edges of their territory, in places like Gaul and Morocco, the Roman government was reluctant to even recognize the threat of the barbarians, thinking that even accepting that these barbarians were causing trouble would weaken their prestige in the public eye.
They fought Mexico/paid Mexico. Not really sure. Hopes this helps.
When Cuba and the Soviet Union started to trade nuclear weapons.
The Shang had a number of religious practices, one of which was veneration of dead ancestors; Shang people made sacrifices to and asked questions of their ancestors.
Ancient Chinese nobles sought to tell the future by writing on bone fragments or pieces of turtle shell and throwing those bones into a fire; the fortune seekers saw messages about the future in the cracks that formed.
Shang dynasty craftspeople mastered bronze, an alloy of copper and tin; bronze weapons gave Shang foot soldiers and charioteers a tactical advantage in combat.
Answer:
Democracy consists of four key elements: a political system for choosing and replacing the government through free and fair elections; the active participation of the people, as citizens, in politics and civic life; protection of the human rights of all citizens!