By the time I came to write Nemesis, I no longer doubted that maintaining our empire abroad required resources and commitments that would inevitably undercut, or simply skirt, what was left of our domestic democracy and that might, in the end, produce a military dictatorship or - far more likely - its civilian equivalent. The combination of huge standing armies, almost continuous wars, an ever growing economic dependence on the military-industrial complex and the making of weaponry, and ruinous military expenses as well as a vast, bloated "defense" budget, not to speak of the creation of a whole second Defense Department (known as the Department of Homeland Security) has been destroying our republican structure of governing in favor of an imperial presidency. By republican structure, of course, I mean the separation of powers and the elaborate checks and balances that the founders of our country wrote into the Constitution as the main bulwarks against dictatorship and tyranny, which they greatly feared.
We are on the brink of losing our democracy for the sake of keeping our empire. Once a nation starts down that path, the dynamics that apply to all empires come into play - isolation, overstretch, the uniting of local and global forces opposed to imperialism, and in the end bankruptcy.
I'm a very lucky person with every allergy known to man but still happy to be enjoying a wonderful life living in the best place in the world!