Western societies from ancient Athens to imperial Rome to the French republic rarely collapsed because of a shortage of resources or because foreign enemies proved too numerous or formidable in arms - even when those enemies were grim Macedonians or Germans. Rather, in times of peace and prosperity there arose an unreal view of the world beyond their borders, one that was the product of insularity brought about by success, and an intellectual arrogance that for some can be the unfortunate byproduct of an enlightened society.

Did either the nonexistent or the measured response after a series of attacks on Americans the past decade - in Lebanon, Africa, Saudi Arabia, New York, and Yemen - suggest to our terrorist enemies that it was wrong and unwise to kill reasonable and affable people, or did the easy killing imply that self-absorbed and pampered Lotus-eaters would not much care who or how many were butchered as long as it was within reasonable numbers and spread out over time?

We have had raucous moments in our history. And I think we're in one now. But it's not going to endanger the future of democracy.

In history, one gathers clues like a detective, tries to present an honest account of what most likely happened, and writes a narrative according to what we know and, where we aren't absolutely sure, what might be most likely to have happened, within the generally accepted rules of evidence and sources.

The president who is most slandered as Hitler will probably prove to be the most zealous advocate of democratic government abroad, the staunchest friend of beleaguered Israel, and the greatest promoter of global individual freedom in our recent memory.

I think there's a group of students - whether it's the micro-aggression or the safe space or the trigger warning that garner a lot of attention - but that the fundamental issues that they're more interested in are - and I'll be very frank here - how much money do I pay for a unit? And what is that unit going to do for me when I'm graduating?And even though this is mostly in a progressive landscape, they're asking questions that have not been asked of the university. And the university can't supply answers to them.

The American people are not naifs who yearn for isolationism, but they are starting to ask some hard questions about the way we have been doing business for 50 years, and it may well be time to grant the French, Canadians, Germans, Turks, South Koreans, and a host of others their wishes for independence from us: polite friendship - but no alliances, no bases, no money, no trade concessions, and no more begging for the privilege of protecting them.