I also like the comparisons drawn between America and the fall of Rome with regards to entertainment.
As Rome grew more and more powerful, its entertainment became more gruesome and all-encompasing. The matches at the Colliseum and Circus Maximus became more and more bloody, while people spent a higher proportion of their time following the "stars" of the day and attending events. I see parallels in the US with regards to our movie star/athlete/etc hero worhsip and the fact that our diversions seem to be getting more brutal (UFC, toughest man competitions, movies, TV etc.). It seems that as the "elite" become even more gruesome in their exploits, the rest of us grow progressively weaker, believing that we are not capable of such "acts of heroism." Some believe that these bloody diversions led to a general "pussifying" of Rome.