Remember that in any major nuclear war, the first strike destroys the country that attacks; it's been known for years. The first strike of a major power is very likely to cause what's called nuclear winter, leads to global famine for years and everything's basically gone. Some survivors straggling around. Could [Donald Trump] do it? Who knows.

I think that what's actually happening is the collapse of the Center - the centrist semi-coalitions, mildly social-democrat, mildly conservative, that have been running the countries for years. They are severely declining. You can see it in voting; you can see it also in popular attitudes: contempt for what are called "the élites," the experts, the people in charge.

If you go to one demonstration and then go home, that's something, but the people in power can live with that. What they can't live with is sustained pressure that keeps building, organisations that keep doing things, people that keep learning lessons from the last time and doing it better the next time.

When something like this [2003 invasion of Iraq] takes place, the international law professionals have a complicated task. There is a fringe that just tells the truth: Look, it's a violation of international law. But most have to construct complex arguments to justify it as defense counsel. That's basically their job, defense counsel for state power.

And if you look at all this academic work in the conferences and so on there's a constant theme that terrorism is extremely hard to define and we therefore have to have a deep thinking about it. And the reason it's hard to define is quite simple. It's hard to find a definition that includes what they do to us but excludes what we do to them. That's quite difficult. So it takes a global war on terrorism.

In a moment of crisis, of which there are all too many, Russian military planners may conclude that lacking a deterrent, the only hope of survival is a first strike - which means the end for all of us.

The British had an even stronger [then America] business interest in Nazi Germany. And Benito Mussolini was greatly admired.