Final answer:
The theme of the post-classical period is the Arab-Islamic civilization as a globalizing agent.
Step-by-step explanation:
The theme of the post-classical period in history is The Arab-Islamic civilization as a globalizing agent. During this time, the Arab-Islamic civilization had a significant impact on the world, spreading their influences through trade, knowledge, and cultural exchange. They developed a vast empire, established political stability, and helped to preserve and translate ancient works of literature, science, and philosophy.
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