One piece of evidence that moser uses in the passage to support his claim regarding nationalists is; That the US government had to develop protectionist policies to tackle the attack on economic liberalism
This question is taken from an article written by John.E.Moser about how global commerce which was a very important characteristic of economic liberalism, was severely under attack and how the crisis spread through to other countries.
Finally, The U.S government made use of protectionist policies that helped in safeguarding its economy, and other governments imposed retaliatory tariffs which made the crisis worse.
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