What's interesting about Navalny is that he has run a - not so much a pro-democracy campaign in Russia, but an anti-corruption campaign. He seems to have access to quite a lot of information about very senior Russians, including Putin.

Putin is not a mass murderer. But, having said that, he is a product of the KGB, and the KGB was, of course, the secret police force of the Soviet Union.

Globalization has genuinely drained power away from national politicians and people feel it. People in our fast digital age are also frustrated with the comparably slow democratic processes. Many young people - and some old people - want to know, Why does everything take so long? Why can't someone just decide and then move forward?

We can't continue assuming that politics is something which is decided elsewhere by distant leaders in a distant capital. Protest is insufficient too. If people who are willing to put time into demonstrations also prove willing to work on behalf of candidates in local elections - or to become candidates themselves - they will achieve far more. If all of this upheaval provokes more involvement, then we have a slim chance of ending up with more vibrant democracies eventually. The alternative, as you've hinted, is that democracy fails altogether.

The nationalist right have common views. They hate the EU, they hate NATO, they dislike trade, they admire Russia. Many of them are funded by Putin.

Donald Trump may undermine some of the traditional checks on the presidency: the press in particular, but also the various government and Congressional ethics bodies, as well as the career civil service.

If Putin decides to run, which we are assuming that he will, there really isn't anything that can stop him. He can manipulate the system so that he has not real opponents; he can manipulate the media so that nobody else gets any coverage. And then, if worse comes to worse, he can - as he has done in the past - just change the electoral results. So, it's not like it's going to be a very exciting election.