The ever-increasing complexity of organisms, evident in the fossil record, is a consequence of the unrelenting competition for survival that propels evolution.
It was accompanied by the emergence of nervous systems and the first inkling of sentience. The continuing complexification of brains, to use Teilhard de Chardin’s term, enhanced consciousness until self-consciousness emerged: awareness reflecting upon itself. This recursive process started millions of years ago in some of the more highly developed mammals. In Homo sapiens, it has achieved its temporary pinnacle.
But complexification does not stop with individual self-awareness. It is ongoing and, indeed, speeding up. In today’s technologically sophisticated and intertwined societies, complexification is taking on a supraindividual, continent-spanning character. With the instant, worldwide communication afforded by cell phones, e-mail, and social networking, I foresee a time when humanity’s teeming billions and their computers will be interconnected in a vast matrix — a planetary Übermind. Provided mankind avoids Nightfall — a thermonuclear Armageddon or a complete environmental meltdown — there is no reason why this web of hypertrophied consciousness cannot spread to the planets and, ultimately, beyond the stellar night to the galaxy at large.