If only one-quarter melted, it would lead to a 2-metre rise in sea-levels all over the world and would threaten thousands of cities and towns on every continent.

You can't stay in your lane anymore – you need to be good at multiple things, and understand interactions.

I spent 20 years in executive search, and I was hired by my clients to call 'the most successful people' in the world. Bold face names in bold face organisations. However it wasn't that hard, because despite all the success, which is why I was calling them, they were not very happy which is why they were calling me back.

With Foursquare, our original app was a good idea but it wasn't a hundred million users good idea. The data behind the app, and what we do with the data? That's our good idea. That's our hundred million dollars in revenue idea.

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.

The digital world has democratized content – it's now available on every platform all the time – and we're going to see a whole raft of new stars, because talent can be rewarded.

Bill Drayton has pioneered the field of social entrepreneurship, growing a global association of over 3,900 leading social entrepreneurs who work together to create an 'Everyone a Changemaker' world.

Purpose doesn't come to people sitting at the starting blocks and thinking about purpose. You have to live it.

We believe people don't have to fear the innovation age as being victims of it. They can actually embrace it by saying 'okay, I've got to have some additional skill sets I can go back to'.

I've sat by all the infinity pools I need and I don't have a single memory of sitting by one.. Luxury is also kind of gross to me now.

With leadership and privilege comes immense responsibility. And in this case, it basically took 20 years for the US to replace the Taliban, with the Taliban. This is a backward step of epic proportions for women's rights.

I remember being on a spacewalk and had a few seconds to see a view that humans were not meant to see. It was like I was hearing from God. But then, I had to get back to work.