I’m often described as an environmentalist, but it’s sustainability that has underpinned my entire career. I care as much about social justice, human rights and democracy as I do about biodiversity, pollution and climate change. Environmental problems are really a subset of much bigger economic and social issues, and even those have to be tracked back to much deeper philosophical and spiritual concerns.

Which is why I consider myself very fortunate to be involved in a wide range of different organisations, reflecting the full depth and breadth of sustainability today.