Final answer:
The end of the Pax Romana in 180 CE marked a period of political instability in the Roman Empire.
Step-by-step explanation:
The end of the Pax Romana in 180 CE marked a period of political instability. The Pax Romana was a time of relative peace and stability in the Roman Empire, but after it ended, the empire faced numerous challenges such as power struggles, invasions, and economic issues. The decline and fall of the Roman Empire can be attributed to a combination of internal weaknesses, external threats, and economic factors.
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