'There are, of course, major differences between emigrating from Europe to America and colonizing the solar system. Human bodies have not evolved to live in outer space. They have co-evolved—and mutually depend upon—the other members of their biotic community here on Earth. To survive in space, expansive sustainability will require that humanity become post-human. Future dwellers of the expanse will have new bodies and new relationships to their bodies. That said, advocates of post-planetary sustainability aim to perpetuate forms of life and ways of viewing the world that are characteristic of how humans imagine themselves today. Stephanie Le Menager has described us as “living oil,” as beings whose cultured forms of existence are inseparable from the dominant—and unsustainable—source of energy which powers our civilization. The post-planetary dream of colonizing Titan, a moon of Saturn covered with hydrocarbon lakes, is clearly entangled with the fact that there, human beings might be able to continue living as oil, but without the catastrophic consequences that will follow by remaining on Earth.'
