Abstract

1. I begin with a citation from Our Final Century . Its author is Sir Martin Rees, the current President of the Royal Society. A race of scientifically advanced extra-terrestrials watching our solar system could confidently [have predicted] that Earth would face doom in another 6 billion years, when the sun in its death throes swells up into a ‘red giant’ and vaporizes everything remaining on our planet's surface. But could they have predicted this unprecedented spasm [visible already] less than half way through Earth's life – these million human-induced alterations occupying, overall, less than a millionth of our planet's elapsed lifetime and seemingly occurring with runaway speed? …. It may not be absurd hyperbole – indeed, it may not be an overstatement – to assert that the most crucial location in space and time could be here and now. I think that the odds are no better than 50-50 that our present civilization on Earth will survive to the end of the present century without a serious setback…. Our choices and actions could ensure the perpetual future of life… or, in contrast, through malign intent or through misadventure, misdirected technology could jeopardize life's potential, foreclosing its human and post-human future