It is not altogether true that a system of succession never existed. Within the Julio-Claudian family there existed a settled tradition that sons (and if not available, other near relatives) should succeed. If you'd check under 'family tree of Roman Emperors' in Wikipedia, you will see that many emperors belonged to family trees where succession went along the same lines and did not lead to national unrest.
The problem mainly was that so few Emperors died peacefully in their beds; a great number was murdered for not living up to expectations, certainly in the later years of the Empire. A formal system of succession would have been of little use in these cases: if you murder an emperor, it is not a clever idea to allow his son on the throne who will want to revenge his father by having you executed. Or allow an established "succession commission" to appoint someone not sympathetic with your actions.
In those later years, the often violent death of an Emperor usually led to a power struggle amongst his murderers, while at the same time one or more armies in the provinces declared for their commander as the new emperor. This invariably caused a lot of civic unrest each time it happened. It also precipitated the loss of control over provinces as armies who were trying to see their commander on the throne lost focus on the job they were supposed to do in their province: keeping order and keeping out any tribes trying to get in.
plunged Rome into civil wars that ended the Pax Romana and threatened the unity of the empire, and the effective system of succession was broken down.
totalitarian
The Continental System was designed to hurt Great Britain and the British Empire.
Communication was one big problem. Even though the Romans had good roads and a signal system, it still could take days or sometimes weeks for a message to get from a province to Rome. And more time for the reply to get back to the province. Another problem was the various conditions in different parts of the empire. A law, that worked in Rome, for example, might not be reasonable or even enforceable in a place like Thrace or Dacia.
Bureaucracy.
I wish I could answer you, but i have to answer the same question for my homework right now :P
plunged Rome into civil wars that ended the Pax Romana and threatened the unity of the empire, and the effective system of succession was broken down.
The Inca Empire did not have a formal currency system like coins or paper money. Instead, they operated on a barter system where goods and services were exchanged for other goods and services. They also used a system of tribute and labor taxes to gather resources and maintain their empire.
India has no unique basic formal education system preliminary basis
A formal organization is often conceived as a communications system. Is it? How
advantages and disadvantages of using a formal feedback system?
The formal bookkeeping system refers to the recording of the financial of the transactions. It is a very important part and aspect of the accounting.
There is no historical evidence to suggest that Charlemagne killed his sons. Charlemagne was known for his efforts to ensure a peaceful succession by dividing his empire among his sons and setting up a system of co-rulership.
the french system of formal study.
what is the difference between the alternative learning to the formal education system
A binomial system is binomial nomenclature which is the formal system of naming specific species.
the road system helped the incas govern their vast empire