For those concerned with the fate of the earth, the time has come to face facts: not simply the dire reality of climate change but also the pressing need for social-system change. The failure to arrive at a world climate agreement in Copenhagen in December 2009 was not simply an abdication of world leadership, as is often suggested, but had deeper roots in the inability of the capitalist system to address the accelerating threat to life on the planet. Knowledge of the nature and limits of capitalism, and the means of transcending it, has therefore become a matter of survival. In the words of Fidel Castro in December 2009: "Until very recently, the discussion [on the future of world society] revolved around the kind of society we would have. Today, the discussion centers on whether human society will survive."
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