Well, the moment the US intervened with the affairs of the World was the moment that the US could not go back to an isolationist policy. The US simply cannot afford to stop playing a role in world affairs, due to the fact that the US is a capitalist society and that the US has a lot of exports/imports. Unless the US can reach a level of capacity where it is self sufficient, which is currently impossible to do, the US must participate in the affairs of the World in order to survive.
Answer:
William the Conqueror established a tradition of royal authority in England by retaining large amounts of land under his direct control, forcing all vassals to swear first allegiance to him, and keeping account of all property in England through a census.
The biggest effect of the French and Indian War was that it taught the 13 American colonies how to fight together. Before this war there was a mutual distrust between the thirteen. The next common foe would be Great Britain in the American Revolution.
This war also left Great Britain in extreme financial trouble within their military which of course will be a huge advantage for the colonists in the Revolution.
Great Britain tried to tax the colonists to make some money to be able to afford their military but this backfired when the colonists asked for representation in parliament-were denied- and started tossing tea off ships in Boston.
Therefore, we can really thank the French and Indian War for paving the way to our freedom.