Name and explain one reason for the start of the decline of the Roman Empire.

Invasions by Barbarian tribes

The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders

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civil disobedience, refusal to obey the demands or commands of a government or occupying power, without resorting to violence or active measures of opposition