To use an analogy, when you squeeze toothpaste out of a tube, it's quite hard to get it back in. By the same token, by the time you see inflation, it's too late. The key is inflation expectations.

I started to get concerned about the natural world as a child and there are 2 images that I remember always from my childhood. In London Zoo, I remember the sound of the iron doors that clanged behind us as we went in. And there they were… these wretched creatures, walking up and down their very small caged area. I hated it! I absolutely hated it without knowing why really, at that age. Later in the Kruger, I saw a group of lions, obviously a pride, sitting peacefully and calmly under a tree. And these two contrasting images in a way became symbols for the rest of my life and the way I think about wildlife. One is how not to keep them, and one is how to leave them alone where they should be.

Truth is a quality of reality. It has nothing to do with what I believe. Truth, when it comes to empirical issues, is an objective thing. Whether something is true or not is independent of whether I think it is true or not, and a lot of people confuse this.

These are technologies that are autonomous in many, many ways. They are independent in many, many ways – they have free will. They can replicate. And that makes a difference because then we teach them how to learn, but we have no idea what they will do with that ability to learn and develop intelligence.

There are two basic underlying reasons economies slow down. Firstly dysfunctional politics and secondly economic mistakes.

You have to keep reaching, keep thinking about what the next-level is.

The greatest risk often lies in people's biased perceptions of risk itself. The challenge is: how do you debias risk when everyone's perception of it is inherently biased?

You cannot expend more energy than you can consume. That's a fundamental law of physics. If you do, you starve, you die, and you remove yourself from the gene pool. Biological systems have therefore been under enormous selective pressure to develop highly efficient intelligence.

Fundamentally you build trust with people by giving them trust.

I scaled the business from just me, to 10,000 people some 20 years later. Scaling and keeping control of that business was practically impossible- I failed many times, but managed to succeed overall through sheer determination, hard-work and having very, very good people.

This crisis is expected to trigger migration from these vulnerable regions to the more resilient Northern countries, with projections suggesting 80 million to 200 million people could be displaced by 2050 if we fail to mitigate the impacts.

It turns out, though, very clearly, that our social networks are no larger in virtual worlds than in reality. The people you have on your network are the people you would typically keep into contact with in reality, face to face. The difference is, though, that you get lots of 'hangers on' appearing on your network.