As Britain left the EU at the end of January, I reflected again on one of my most utopian beliefs; that greater co-operation, integration and sharing of common pool resources are better than retreating into the exclusivity of identities or privileges.

I don’t think I am naive for believing everyone on this planet can get along a lot better — I will never tire of using that cliché — that we should do whatever we can to roll back injustices, and should at least try to do so without harming anyone else...