A lot of the Russian economy is built around people who are one way or another milking the state and taking money from the state and recycling it into their private bank accounts. And there are a lot of people who are taking advantage of that, so it's not just one person. It's a kind of web of people doing that, and that's how the system stays in power and how people stay in control.

I didn't like doing predictions. It's certainly true that right now - and this could change tomorrow - but, right now there is no clear way for Putin to lose power. There seems little chance that a street revolution could unseat him; that's just not how things are going to work in Russia. And it seems as if the very tiny number of people who control the economy and who control politics in Russia are loyal to him.

Khodorkovsky is richest man. And he lost everything when Putin arrested him and took his company away, and essentially took his company away, sold it, and gave it to other people, and enriched them. So, he's a complicated figure as an opposition leader, and people admire him - he was in prison, and he was very brave, and he's written some good things since then, and so on. But at the end of the day, people see him as being part of the corrupt system that has done so much to undermine the Russian system since the 1990s, and I don't know that he can ever be a really popular leader.

The world has always been a dangerous place. Now it is dangerous in a different way, because the world order that we've known since the end of the Cold War has been radically transformed. All of the institutions that preserved peace and promoted global trade will be weaker - NATO, the EU, NAFTA - and US relationships with other countries will change, too.

To describe Russian politics as "managed democracy" - and that's sometimes hard for outsiders to understand, because a lot of the forms of democracy exist in Russia, so there are elections; there is a press; there is a campaign, and so on. But the outcome of the campaign is never in doubt. So the campaign is manipulated. There is a real opposition in Russia. There are one or two real opposition figures who do want to change the political system, but they will probably not be allowed to run, and one way or another they will be prevented from being on the ballot.

Americans have long felt that NATO isn't doing its job and that the Europeans aren't contributing enough. Trump has accelerated the decline in Atlantic solidarity by offering open contempt for NATO allies as well. The future of NATO now very much depends on Europeans. Can you begin to identify security threats, prepare yourselves and arm yourselves without the US?

Putin saw the Ukrainian revolution as a challenge to him personally, and I think that's why he, in fact, over-reacted. I think his occupation of Crimea and then annexation for him was actually a mistake from Russia's point of view. And then his invasion of Eastern Ukraine was also a mistake. He imagined that he would invade Eastern Ukraine and then eventually split the country in half, and he discovered that in fact, Russian-speaking Ukrainians are not Russians, and they didn't support him.