There's just no - nothing like this country, which is the only, really, multiracial country that's tried to share in a common culture in the history of civilization that's pulled it off. A lot of the times, we want perfection. If we're not perfect, we're not good.

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.

The problem with deterrence - apparently sometimes forgotten by our former presidents - is that it is not static, but a creature of the moment, captive to impression, and nursed on action, not talk. It must be maintained hourly and can erode or be lost with a single act of failed nerve, despite all the braggadocio of threatened measures. And, once gone, the remedies needed for its restoration are always more expensive, deadly - and controversial - than would have been its simple maintenance.

Donald Trump, he didn't dismantle Eastern European missile defense. He didn't go to Geneva and press a plastic red button. He didn't make fun of Romney for saying Russia was an existential enemy. He didn't have a hot mic exchange with a Russian President saying that he would be more flexible with the Russians after the elections.

Most authoritarians do not surrender power voluntarily.

Cheap anti-Americanism will eventually have consequences.

Often, the pretexts for starting a war are not real shortages of land, food or fuel, but rather perceptions - like fear, honor and perceived self-interest.