What advantages did Eurasia trading have over the Americas? In other words, why didn't the Americas have as sophisticated a trading network as say the Indian Ocean trading?

What were the political, social, and economic effects of trade routes? Political: Governments changed to focus around trades, some taxes merchants or controlled the price of goods. Economic: Many countries changed due to silk such as it only being allowed on elites, trade also made many countries change positively.

Explanation:

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4 is the oni could think of