Changizi: Humans, Version 3.0

The next giant leap in human evolution may not come from new fields like genetic engineering or artificial intelligence, writes Mark Changizi, but rather from appreciating our ancient brains:

Simply put, none of these scenarios are plausible for the immediate future. If there is something next, some imminently arriving transformative development for human capabilities, then the key will not be improved genes or cortical plug-ins. But what other way forward could humans possibly have? With genetic and cyborg enhancement off the table for many years, it would seem we are presently stuck as-is, sans upgrades.

There is, however, another avenue for human evolution, one mostly unappreciated in both science and fiction. It is this unheralded mechanism that will usher in the next stage of human, giving future people exquisite powers we do not currently possess, powers worthy of natural selection itself. And, importantly, it doesn’t require us to transform into cyborgs or bio-engineered lab rats. It merely relies on our natural bodies and brains functioning as they have for millions of years.

This mystery mechanism of human transformation is neuronal recycling, coined by neuroscientist Stanislas Dehaene, wherein the brain’s innate capabilities are harnessed for altogether novel functions.

This view of the future of humankind is grounded in an appreciation of the biologically innate powers bestowed upon us by hundreds of millions of years of evolution. This deep respect for our powers is sometimes lacking in the sciences, where many are taught to believe that our brains and bodies are taped-together, far-from-optimal kluges. In this view, natural selection is so riddled by accidents and saddled with developmental constraints that the resultant biological hardware and software should be described as a “just good enough” solution rather than as a “fine-tuned machine.”

So it is no wonder that, when many envisage the future, they posit that human invention—whether via genetic engineering or cybernetic AI-related enhancement—will be able to out-do what evolution gave us, and so bootstrap our species to a new level. This rampant overoptimism about the power of human invention is also found among many of those expecting salvation through a technological singularity, and among those who fancy that the Web may some day become smart.

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