Just to add ... get a large enough swathe of Sub-Saharan Africa and the Mercosur countries, AND ASEAN, and it gets more interesting for Australia, South Africa, and India to make a deal, which is three of the dirty six. If that tips China in, its four of the dirty six, with only Russia and the US out in the cold.

I've been accused of being a Marxist, yet while Harpo's my favourite, it's Groucho I'm always quoting. Odd, that.