Now for the cynical response
Most conspiracies originate in America because American's don't have anything else to worry about.
Now lemme explain. In, say, Somalia, people are fighting for thier very existance. They start each day with the goal of finding something to eat while
civil war ravages their nation. Others are oppressed by dictators or terrorist organizations and have that to worry about. All in all, for the regular
average Joe, life is pretty hard.
Yet, in America, we're loaded. Do you have any idea how unusual our grocery stores are? We get pissed if we go to get a lime -- out of season, mind
you -- and it's not really juicy. We get upset if they're out of cheetos at the gas station. We're annoyed with traffic, with bills, with taxes.
All really minor things.
People thrive on conflict and overcoming it. Everyone does, why do you think sports and video games are so popular? Combatting rush hour traffic
really isn't that fulfilling, so people start looking for something big to try to take on. The mind will find what it seeks, and if you're seeking a
grand conspiracy, you will
find it. People can draw connections to events which are totally unrelated, yet, if you're looking for some
nefarious deed/conspiracy, it could make perfect sense to connect the issues in your mind. Thus, you have a conspiracy.
People live on conflict. When there is none, people create it. American's and much of western Europeans don't have much conflict to deal with
compared to the human norm in the world today, and so they create/discover conflict. That's a major reason, in my opinion, why America has so many
conspiracies associated with her. It is not
the most evil nation to curse the Earth, but sometimes we wish it was so we could do battle against
evil and triumph.