we need fish. Our brains don't form properly without their fatty Omega-3 acids. So why do our governments allow this process of destruction to continue? Why do they actively encourage it, with $14bn of subsidies for fishermen to keep on trawling every year?

A small number of people are making a lot of short-term profit out of this destruction – and they are using this cash to ensure they can carry on hunting, down to the last fish.

Our societies are structured to put these short-term cries for money for a few ahead of the long-term needs of us all. A small determined group with hard cash almost always beats a diffuse group with good intentions – until they get angry and fight back.