Is America fighting for its empire?

Today my Archaeology teacher was talking about how every empire eventually completely caves in upon itself in one form or another, and I began to entertain the possibility that through all the protesting, arguing, and disagreement- perhaps the United States is acting accordingly.

If you consider what it will be like reading about the US 200 years from now, will its fall be that big of a surprise? The writing has been all over the wall since the 50s, and has riddled major media since the 80s.

So; is America justified in its actions to defend the empire, even if they don't come to truthful terms with them (has anyone ever?)

So you should just be a little myrmidon and let the government control every aspect of your life? Anyone in this country who can't feed themselves one way or another is a lazy bum. If you're in poverty, it's your own damn fault. Aside from physical or mental handicaps, there's no excuse for it. BAM, the truth hurts, kids.