Hoover's response to the Great Depression was the Smoot-Hawley tariff which rose tariffs on over 20,000 products. This measure led to retaliation from foreign countries especially from Europe and they rose their own tariffs on their American imports, the American economy was hit back and it explains why Hoover's policy failed.
Hoover was nicknamed "Do nothing" by the Democrats, they blamed him for sticking to Laissez faire economics, but this accusation was wrong as he pushed for more state intervention which eventually failed.
Most famously, blitzkrieg describes the successful tactics used by Nazi Germany in the early years of World War II, as German forces swept through Poland, Norway, Belgium, Holland and France with astonishing speed and force.
The type of government was based on the idea people can govern themselves is Democracy.