Answer:
After the Magna Carta it became clear by the English that the monarch must no have too much power. The Magna Carta helped shaped many documents today and is the reason many countries are democracies.
The foreign policy issue that was a motivation for American intervention in Vietnam was the idea of "containment" which sought to contain communist expansion where it was, as opposed to attempting to eradicate it at the source.
The Greeks. I cannot recall what they were called then.
