Is there any possibility of giving international air travel, which we all need and use and hate, a touch of glamour, or even of reliable, soulless efficiency? I suspect future historians will puzzle over our failure. But by then, of course, we shall be in the age of mass space travel, with its fresh and unimaginable crop of horrors.

Indeed it is the protean ability of Western civilization to be self-critical and self-correcting - not only in producing wealth but over the whole range of human activities - that constitutes its most decisive superiority over any of its rivals.

In the past, the U.S. has shown its capacity to reinvent its gifts for leadership. During the 1970s, in the aftermath of the Nixon abdication and the Ford and Carter presidencies, the whole nation peered into the abyss, was horrified by what it saw and elected Ronald Reagan as president, which began a national resurgence.

The planet Earth, though not threatened with destruction by man-made global warming, is by no means indestructible. There are many unpredictable events within our solar system, and still more outside it, that could make Earth uninhabitable by humans.

I know that. I'm having a ball. I'm not slap happy. I'm just filled up with joy and with peace and with all kinds of things that have eluded me for quite a few years. And they're back and they're thriving.

I hate war. Absolutely, I hate war.

Peace was declared, but not all of us were drunk with joy or stricken blind.

Trump himself has not laid out a clear agenda on the national security issues that are the most pressing for the United States, from the resurgence of the Taliban in Afghanistan to the deepening Syrian civil war to the fight against ISIS in Iraq and Syria and the flexing of Russian muscles under President Vladimir Putin.