Book excerpt: This revolutionary book fuses the enduring legacy of socialism--government for the common good--with the best of the environmental movement and the newest insights from sustainability studies. The result is a manifesto--a roadmap forward in the face of the growing environmental catastrophe, which is the most complex crisis humanity has ever faced. American conservatives like to say that Marxism was destroyed by its opponents and by the mistakes of Marxist governments. Organic Marxism provides the definitive answer to this charge. As we approach the planet's limits, however, there is no other option but to shift to an organic, ecological civilization. Clayton and Heinzekehr show how scientists and economists, farmers and small business people, artists and religious leaders are coming together around the globe, building communities for the common good.