<span>Roosevelt Corollary's message to the rest of the world was that the US was in charge of the Western hemisphere, but simultaneously that they were uninterested in world issues and were not going to meddle in the business of other countries. There was also a lot of emphasis on the strength of the US's economy and of the navy.</span>
World War 1. The first world war was an eye opener to many countries, and the world was determined to prevent another such event from happening.
Sand dunes are formed by wind.
Explanation: Dunes form when wind blows sand into a sheltered area behind an obstacle.
If taken to extremes, nationalism can create a great deal of international instability and violence. Extreme nationalism can lead to a sense of superiority and even militarism and aggression towards others who are not part of the nation.
