Before the First World War, politicians of the great powers blustered at each other, believing they defended their national interests. Today they are remembered for provoking the deaths of 15 million people. Before WWII, Germany and Japan each felt they had been deprived of their rightful place in the world. That attitude spawned their expansionist régimes. Seventy million people died. In Copenhagen today politicians from rich and poor nations claim their right to spew the planet’s carbon into our atmosphere. There is a difference: the negotiators today in Copenhagen already know that if they fail, they will be responsible not for a few millions but for hundreds of millions of deaths, and misery for billions. Madagascar is one of many place...