Terry Pratchett notes in one of his discworld books that politics is fundamentally about the running of the city. Politics - from Aristotle's ta politika "affairs of state,", from the Ancient Greek polis - the city state.
Something - perhaps Greg Combet's assertion that "[it is] very widely agreed throughout domestic politics and international politics that an emissions trading scheme which fixes a carbon price by a market mechanism is the best way of getting a carbon price into the economy." - tells me that politics just doesn't cut it any more. Politics really does still deal on this level, the level of the ciity state. everything is one big race between competing countries, to get the best deal in the fastest time.
We need a way of dealing with systems bigger than the city state. We need ta geotika. Affairs of the Earth. A global politics - geotics.