The signs are all around. Many places in the world show degradation of the air, water, and soil. Species becoming extinct as natural habitats are being destroyed. The emissions of greenhouse gases that can alter the planet’s climate are unacceptable. All the environmental issues put together amount to a very serious threat to human welfare. Yet at the same time, all accepted measures of well-being show that, on average, quality of life is improving around the globe. How does an environmentalist call society into action under such conditions?