What were the only two South American countries that did not experience significant labor issues in the 1950s?

Name: What were the only two South American countries that did not experience significant labor issues in the 1950s?
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Uruguay and Paraguay were the only two South American countries that did not experience significant labor issues in the 1950s, largely due to their more stable economic conditions and smaller industrial sectors compared to their neighbors.

What Were the Only Two South American Countries That Did