The philosopher Ludwig Wittgenstein once remarked that if you ask a man how much is two plus two and he tells you five, that is a mistake. But if you ask a man how much is two plus two and he tells you ninety-seven, that is no longer a mistake. The man you are talking to is operating with a wholly different logic from your own.

I think that competition will exist even if we discover more oil. We're never going to know how much we have, or how long will it last. You are always going to want to have diversity of supply. I think the Middle East will remain a region of competition, of global competition, fighting for a long time.

No two countries that both had McDonald's had fought a war against each other since each got its McDonald's

A golf course should aspire to generate as much energy as it consumes - golf should be leading the way toward energy net zero.

Pessimists are usually right and optimists are usually wrong but all the great changes have been accomplished by optimists.

To me the smart thing that governments in the Middle East would be doing right now is taking their oil and gas fountain - and the smartest ones are to some degree - and making sure they're investing in their people to unlock their potential - men and women.

Once people get a taste for whatever you want to call it - economic independence, a better lifestyle, and a better life for their children - they grab on to that and don't want to give it up.