"It is our destiny to colonize space, " announces the author in the first line of this fascinating book. And then he shows us how to go about that seemingly impossible mission in eight (sort of easy) steps. For example, Aquarius, the proposed second step, describes how building floating colonies in tropical waters - using simple engineering and natural aquaculture to reverse the greenhouse effect and end world hunger - will both halt the decline of the planet and prepare us psychologically for the break with Earth. Although the plan sounds far-fetched, Savage explains every detail, from how to build the Ocean Thermal Energy Converters at the heart of this scheme to why cultivating algae will provide an abundant protein source and rid us of the dangerously high carbon monoxide levels that threaten life on the planet. Savage not only transforms an enormously complicated plan into compelling reading, he also makes appealing the prospect of our life in space. The best parts of life on Earth can come with us to outer space, he claims, and he paints a picture of lunar ecospheres, domed and living preserves of our communities on Earth. Our life in space will not be the barren or bleakly technical existence that we have been led to believe. We will re-create all the beauty and diversity that we had on Earth.