Around 250 to 300 AD, the Roman Empire went through periods of instability that eventually led to the start of "barbarian" invasions and continued through next two hundred years until the Roman Empire collapsed in 476 (or 1453 AD). Barbarians were seen by the Romans as those who lived outside of their civilization and were not as educated or sophisticated as they were. Nations living outside the Roman Empire attempted to cross the border and often colonized, disrupted, or undermined Roman rule over its territory. But did the barbarian invasions actually cause the decline and fall of the Roman Empire, or was it simply a domino effect caused by the large number of events that occurred between 234 and 476 AD . Between 243 and 476 AD, some of the main reasons why Population decline, economic problems, the reign of different emperors, and wars with the Visigoths on two occasions contributed to the fall of the Empire Roman. But eventually, during the 4th century, the barbarians penetrated deep into Roman territory. The barbarians were nations composed of various...