I tell people to work on the practical side - like the MBAs in Sustainability - but also on your inner life. You need emotional and spiritual capital because you're effectively standing outside the existing system.
I adore city life, but recognize that living and working together in close quarters presents huge challenges - and that it's not going to get easier as we continue to grow and welcome people from around the world.
This is the true story of a couple of ordinary Americans who thought, once they turned 60, that life would be uneventful. Instead, they've just won a prestigious award that honours their world-changing work.