Over the past twenty years, such physicists as Freeman Dyson, Fred Hoyle, Martin Rees, and Paul Davies have argued that the universe is fine-tuned for carbon-based life. Now, Michael Denton extends their argument all the way from the carbon atom to advanced and complex life forms closely resembling ourselves, showing that our biosphere is central to nature's destiny. Though we may have six-fingered cousins elsewhere, the laws of nature are tuned to reach an endpoint in mankind.