The prosperity of the ''boom years'',led to the extravagant lifestyles for the wealthy which eventually led to the collapse of the wall street stock market''?

During the years of the great boom caused The Great Depression in the United States. The depression was caused by  maldistribution and over production of agricultural products as well as automotives. After the war, agriculture and manufacuting over production occcured, President Coolidge paid less attention on this querry which resulted to the Great Depression

Probably japan. they got a really high life expectancy.