How come Italy used to be the center of the civilized world,

[Plug Drugs]

no we can't, the feudalism that ultimately developed in england was very different from the feudalism that developed on the continent and you dont get to make these weird ass assertions

why not you've just been pulling the argument about barbarians being the founders of the Feudal age out of your ass with no references; you must be thinking "uhh yeah it makes sense in my head so it must be true".
Just because Britons were Anglos or Saxons by blood does not mean that the Barbarian tribes were the ones who invented the Feudal system.