All this adds interesting complexity to those evolutionary psychological accounts which emphasize our ancestral environments. For we must now take into account an exceptionally plastic evolutionary overlay which yields a constantly moving target, an extended cognitive architecture whose constancy lies mainly in its continual openness to change. Even granting that the biological innovations which got this ball rolling may have consisted only in some small tweaks to an ancestral repertoire, the upshot of this subtle alteration is a sudden, massive leap in cognitive-architectural space. For our cognitive machinery is now intrinsically geared to transformation, technology-based expansion, and a snowballing and self-perpetuating process of computational and representational growth. The machinery of contemporary human reason thus turns out to be rooted in a biologically incremental progression while simultaneously existing on the far side of a precipitous cliff in cognitive-architectural space.

In sum, the project of understanding human thought and reason is easily and frequently misconstrued. It is misconstrued as the project of understanding what is special about the human brain. No doubt there is something special about our brains. But understanding our peculiar profiles as reasoners, thinkers and knowers of our worlds requires an even broader perspective: one that targets multiple brains and bodies operating in specially constructed environments replete with artifacts, external symbols, and all the variegated scaffoldings of science, art and culture.

Understanding what is distinctive about human reason thus involves understanding the complementary contributions of both biology and (broadly speaking) technology, as well as the dense, reciprocal patterns of causal and co-evolutionary influence that run between them. We cannot see ourselves aright until we see ourselves as nature's very own cyborgs: cognitive hybrids who repeatedly occupy regions of design space radically different from those of our biological forbears. The hard task, of course, is now to transform all this from (mere) impressionistic sketch into a balanced scientific account of the extended mind.

Previous | Page 1 2 3 4 5 6 Beginning