When I read that letter, the first thing that came to mind was "The Decline and Fall of the Roman Empire" by Edward Gibbon. Civilizations are bound to rise and fall...its cyclical throughout history. But when you look at the the demise of the Romans (arguably the greatest most powerful society in history) - you can see many parallels to modern Western civilization, the letter this young lady wrote, and the direction we seem to be going.
if anyone is interested :
http://www.his.com/~z/gibbon.html
http://en.wikipedia.org/wiki/The_His...e_Roman_Empire