Well, the New Deal extended the power, influence of the Federal Government. Nations can be pretty petty, and states - and state rule -
can be pretty backward and self-defensively obsessive in anti-progress
attitudes.
The Federal Government got employment for a lot of citizens, and had
many of them reconstructing our infrastructure. Roads, dams, etc...
FDR was a wise-guy too,like politically incorrect, is common. Men's life-
expectancy didn't reach 65, the retirement age, though women's did...by a
hair's breadth ?
There was a huge difference between the wealthy and the poor and the wealthy owned most of the land. They had the military support and could easily enact their will. This is why there was a surge in military dictators in the area and it was a difficult struggle for many of them before a democracy with general suffrage was introduced.
The Espionage and Sedition Acts(1917 and 1918)allowed a citizen to be fined or imprisoned for speaking out against the government or the war effort. Benefits of these actions include streamlining war production and removing obstacles to the war effort.
Letters would be an example of a primary source