Answer to Question 1
Why and how the mighty Roman Empire came to collapse in the fifth century is unknown. A great many theories have been advanced, ranging from soil exhaustion and lead poisoning to the malaria epidemic of the third century, and the absence of a system for legitimate succession to the throne. In reality, it is likely that no one problem was responsible. Rome's slow decline was probably the result of a combination of internal circumstances: the difficulties of governing so huge an empire, the decline of the slave trade, and the increasing gap between the rich and the poorduring the Pax Romana, one-third to one-half of Rome's urban population received some form of public welfare. The Empire's internal problems were made all the worse by repeated barbarian attacks on Rome's borders. In 476, a Germanic army commander led a successful attack on Rome and deposed the reigning Roman emperor, Romulus Augustulus, finally bringing to an end the era of the Roman Empire.
Answer to Question 2
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Inhibition as a primary method of succession in the marine intertidal zone.
Primary pulse points of the body.
Fall
The Primary Sensory Regions of the Brain
The Workout (Primary Conditioning Period)
Primary Glands of the Endocrine System