Our definition is extremism is the desire to enforce illiberal views which are in a dichotomy to the liberal values that we all adhere to in a Liberal secular democracy; and you can have non-violent or violent extremism.

Technology isn't a 'thing,' it's a social structure that people act upon the universe through. The social structure has incentives, roles and governance which determine the meaning and effect of the technology, not the engineering itself.

Polarisation presents as a spectrum where people go from disagreeing with each other, to disliking each other and eventually to dehumanising each other. We know that the most important thing it takes to prevent dehumanisation is systemic, regular face to face interaction with the people that might otherwise be dehumanised.

Six years ago, I got a phone call in Boston, an investor asked me what I thought about cultured meat? ..my answer was that it's probably one of the stupidest ideas I've ever heard in my life.!

To have a career, you have to be able to break out of your ways of thinking about success, otherwise you'll just end up disappointed.

I believe that culture isn't a continuous act. We talk about strategizing. We don't just talk about our strategy. I believe that we also need to review our culture, maybe not as much as our strategy, but at key points of a company changing. It is essential to also look at how we are working together.

In my research spanning the last decade, it struck me that we might be conducting a massive, uncontrolled experiment on an entire generation of humans, without fully understanding the potential ramifications. We're all altering our behaviors due to the advent of mobile information, media, and communications technology.

There's a vested interest – if the ideas you're teaching and have worked on are completely abandoned in favour of something else, then your legacy goes to zero. I think that's a big force.

We recently set ourselves the goal of educating 10 million children in the next decade; it's ambitious, but we're attracting incredible people and partners to help us on this journey, and I genuinely believe we'll achieve it.

Compare the 1600s to the present day, and what we do now would seem like magic to people from that era. That just shows you how dramatic the transformation of society has been as a result of science and technological advances.

I actually encrypt my wishes and goals into the things I do. There are creative ways for each of us to embed our wishes into our daily lives, but we have to set those wishes to start with.

Fundamentally, we must slow-down the process of change. We should recognise that most change is not progress- and therefore, it is in our interests to slow down without interfering too much with actual solution making.