It is clear that our present economic system is unsustainable. Never-ending exponential industrial growth on a finite planet is a logical absurdity. We are already using resources at a rate which it would take 1.6 planet earths to replace. We are already undermining the ecological systems which support all of life. Our present economic system has led to an unbelievable degree of economic inequality. To maintain this inequality, both between nations and within nations, military force is used, and democracy is replaced by oligarchy. The future of human civilization is endangered both by the threat of thermonuclear war and by the threat of catastrophic climate change; and both of the twin threats are results of our present economic system. This book documents in detail the serious economic problems of today's world, and it also proposes sustainable solutions.