Robert, except (arguably) for the Civil War, I believe the rise of neoconservatism represents the greatest threat to our nation in our entire history. In some key respects our free society has already been destroyed. Look at FISA. Look at "immunity" for our telecom companies. Look at what all three branches of our government are doing. And on and on and on.
The U.S. House impeached Bill Clinton for lying about a blowjob for christsakes, and our media gave us daily coverage, page after page on the issue every single day for two fucking years. And since then, George W. Bush and Dick Cheney misled us into an illegal and immoral war, are responsible for the slaughter of 4000+ American troops and 70,000+ Iraqi civilians, flushed a trillion dollars down the toilet and have been trampling on our Constitution every day for nearly seven years and they've been absolved of all accountability by both Congress and our media.
Why? Because America's mass media is the Third Person in this most unholy Trinity: a corrupt two-party political system bought and paid for by multinational corporations which don't give a flying fuck about America or its working class.
We've now reached the point where nearly all major sources of traditionally reliable news and information, from the Washington Post to CNN, are now editorially controlled by the exact same tiny group of neocon mouthpieces for the corporate fascist right. As a result Americans are abysmally ignorant of what's going on in their government and the rest of the world. Not only ignorant, but far worse, we no longer even care.
In case you haven't guessed I am not at all optimistic about the future. Ben Franklin predicted the present course of events over 200 years ago, when speaking in favor of passing the U.S. Constitution:
"I agree to this Constitution with all its faults, if they are such; because I think a general Government necessary for us, and there is no form of Government but what may be a blessing to the people if well administered, and believe farther that this is likely to be well administered for a course of years, and can only end in Despotism, as other forms have done before it, when the people shall become so corrupted as to need despotic Government, being incapable of any other."
-- Benjamin Franklin, speech to the Constitutional Convention, September 17, 1787