I kind of thought that the blood was from the increase suicide rate of Americans back then and the deaths of many starving sick kids plus the many that died in the dust bowl and extreme crime rate too, regardless amazing art man!.. Wow!-
The Great depression had a major impact on America and Europe. Many people in America lost their job and for the next decade they were many poor people just travelling around America working at different farms. Also in the state of California many people were homeless. The 1920s weren't enjoyable!
Not only America but Germany as well, Germany borrowed money from America because the Germans were struggling and they were recovering because of the Americans. So when the Wall Street cash happened Germany went into depression again.And that gaze the Nazi advantage.