I went from knowing the value of a dollar to forgetting the difference between $10,000 and $30,000 because everything was expensive. I certainly I got hoodwinked sometimes: people would Google me and the business and charge me astronomical prices.

We're only just acknowledging the importance of those relationships. They're incredibly important because when they're positive, they're a source of joy, energy, productivity, and resilience. There's a lot of research that shows that when we have friends at work, we are more resilient, and we perform better.

Uncertainty creates a strategic incentive for a rational man to go to war. That's not necessarily a mistake as, at the moment, people may wish they had better information, but they may also realise they've made the optimal choice.

You cannot understand entrepreneurial activity without understanding optimism. Research has shown that optimism and overconfidence in individuals is directly linked to their engagement in entrepreneurial activity.

It is difficult to imagine a graver threat; or an area of human endeavour or global ecology in which the profound consequences of runaway climate change would not be disastrous. Already, it is estimated that around 300,000 people die every year as a direct result of climate change.