You know what would make for a useful conversation?
Get ten trades unionists, ten industrialists and ten environmentalists into a room and show them all The Man in the White Suit. A drop of truth-serum in their tea on the sly would set it all up nicely.
They'd all enjoy it. And anyone listening in to the conversation afterwards would probably learn a lot. The whole thing is here.
Alec Guinness and Joan Greenwood - the perfect combination.