Success, in my view, should be a state we inhabit, not just a distant goal we chase. If success is narrowly defined by tangible metrics like money, power, or fame, the benchmarks constantly shift, and satisfaction remains elusive.

Studies estimate that climate change directly contributes to the death of over 400,000 people a year, and costs the world economy over $1.2 trillion per-annum. If we factor in man-made environmental pollution alongside climate-change, over 4.5 million people each year die as a direct result of man's impact on this planet.

Success is different for everyone, but for me success has always been about finding meaning and personal fulfillment. While that may have meant different things at different times in my life, learning, making meaningful connections with people and helping others achieve this same level of satisfaction has been a sign of success for me.

Innovation is not about products or scientific laboratories- it is also about governance, education and everything we do as people. It is not about scientists alone innovating.

I personally think that it's only the ignorant and populism pandering politicians who treat the hedge fund industry as a scapegoat for the financial crisis. It was the extremely heavily regulated investment banks who, risking their shareholders' money, levered their firms up to 40:1!

Think about how that feels when you're told that for this essential skill that is part of the astronaut job, you're not needed. It's as if they were saying, 'You don't bring anything essential and we won't miss you.' That encouragement pushed me to show up to spacewalking meetings I wasn't initially invited to.

Our psychology is open-ended: we can plug in variables, and are not just tied to constants. We can expand our circle of sympathy – we can employ the logic of impartiality, and the emotional prompts of human contact and vicarious experience, and expand our fellow-feeling from our family to our clan, our nation, tribe, and from there to all of humanity and even other sentient beings.

GDP and GNP shouldn't be scrapped, they're of value, but they don't even give us an indication of economic well-being let alone individual well-being

I went from having no parents, to having 65! For kids, it was fantastic, there were lots of activities, a very strong community, and everyone cared for each other.

You have to keep your business in what Jeff Bezos calls day one state. You have to keep your business on its toes, you have to be high energy, and push your people and business to do better. Never let them fall into complacency, into a day two business state. They'd rather always keep them young, energetic, on their toes and hungry.

Art, for him, is a crucial means for turning thinking into doing in the world.

Storytelling is an extraordinary powerful human skill that all of us are wired for; but its best used in the service of ideas.