How did the social trends of the 1920s impact the economy of the 1930s?

The 1920s is the decade when America's economy grew 42%. Mass production spread new consumer goods into every household. ... The U.S. victory in World War I gave the country its first experience of being a global power. Soldiers returning home from Europe brought with them

Explanation:

the steam engine.

the locomotive.

the telephone.

the telegraph.

the internal combustion engine.

the rifle.

ironclad ships.

electricity/light bulb.

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.