The colonization of outer space is key to the survival of humankind. It will be difficult for the world’s inhabitants to avoid disaster in the next hundred years. We are entering an increasingly dangerous period of our history. Our population and our use of the finite resources of planet Earth are growing exponentially, along with our technical ability to change the environment for good or ill. But our genetic code still carries the selfish and aggressive instincts that were of survival advantage in the past. It will be difficult enough to avoid disaster in the next hundred years, let alone the next thousand or million. Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space. This is why I favour “personed” space flight and encourage further study into how to make space colonization possible.

Stephen Hawking