A policy of extending a country's power and influence through diplomacy or military force.
OR
rule by an emperor
In the late 19th century, classical liberalism developed into neo-classical liberalism, which argued for government to be as small as possible to allow the exercise of individual freedom. In its most extreme form, neo-classical liberalism advocated social Darwinism.
The dust bowl was a sever drought caused by fluctuations in ocean temperatures. Other factors that contributed to the affect it had on the Midwest was the dry climate and their use of poor farming techniques.