Earth's Confinement: Space Travel and the Future of Life

For many years I have been convinced that  space travel can ensure the future of our species and all life from our planet. Indeed, if we neglect it, as we have been doing in recent years, we very likely will become extinct within the next few centuries. After getting into a number of screaming matches over these views, I resolved to put them in book form where they can be be evalutated more carefully. As well as space travel, I've taken the opportunity to discuss artificial intelligence, the singularity, and other key aspects of the future. Enjoy!