If those assets are not being productively converted into goods and services that make the world a better place, it's a missed opportunity. Over the past half-century, we've standardised on a 'way' to do things – and that's clearly flawed but continues. We need managers and leaders to up their game if we're going to hope to tackle the environmental, inequality and other crises we face.

Fear is healthy, fear is natural, and if anyone's ever told you they've been to combat and were never afraid... they're either lying or a sociopath. Fear is a very good reaction; it makes you think more clearly.

In order to censor YouTube, for example, countries like Turkey and Pakistan had to block access to the whole site; it's not practical just to block selected content.

We were both passionate that we wanted to really make a difference; soup kitchens are good, but they don't prevent homelessness. You can go to volunteer at a soup kitchen every day of the year, and you'll still have homeless people. We wanted to tackle root causes and tackle them globally.

My interest is not whether something could dematerialize in my hand, but how people can be misled. You can this very dangerous thing- lying- and make it safe to play around with.