In the gold standard currency system, central banks of various countries mainly focus on gold reserves, and rarely actively interfere in the amount of the market. Prices, interest rates, credit, fiscal and trade balances can basically adjust themselves. National currencies have their own legal benchmarks for gold content, which hardly exist The problem of exchange rate fluctuations. In the absence of large-scale wars and revolutions in the past half-century, international trade has flourished unprecedentedly, and global capital has flowed freely. The industrial revolution and urbanization, in the first wave of globalization, transformed the results were quickly pushed to all corners of the world. What is the main point of this passage? ['The gold standard currency system has unique advantages.', 'The gold standard currency system is the foundation of Western civilization.', 'The formation of the gold standard monetary system was inseparable from the industrial revolution.', 'The gold standard monetary system has pushed Western civilization to a new height.']