Most likely there is. The most common example I can think of is in political circles. The goal is most often to create an echo chamber for their thoughts and opinions and keeping other ideas oppressed. Sectionalism exists in any group with a rigidly defined dogma, and closed thinking like that is still rampant in the modern United States of America. <span />
Lech Walesa (polish politician and labor activist)<span />
The main way in which anthropologists are able to make generalizations about human behavior is by looking at how they used to live their life--their tools, migration patters, war tactics, etc--which are very similar throughout populations.
Answer:
See below.
Explanation:
World War I 1914-1918
Isolationism (after World War I) 1920s - 1930s
World War II 1941-1945
participation in the U.N. 1945-present
Containment (after World War II) 1947-1989
Gulf War 1991
