What was the significance of building the panama canal to america? more than 20,000 workers died from malaria and yellow fever while building it. it connected the pacific and atlantic oceans, giving america more control of the western hemisphere. it allowed america to pinpoint the cause of yellow fever. it america with the open door policy.

it was important in history as the site of the ancient city of yin

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john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.