“Oppositional Thinking”—A Review of The Master and His Emissary by Iain McGilchrist—by Gary Lachman, 2012
For millennia it’s been known that the human brain is divided into two hemispheres, the left and the right, yet exactly why has never been clear. What purpose this division served once seemed so obscure that the idea that one hemisphere was a “spare,” in case something went wrong with the other, was taken quite seriously. Yet the idea that the brain’s hemispheres, though linked, worked independently has a long history.
As early as the third century B.C., Greek physicians speculated that the brain’s right hemisphere was geared toward “perception,” while the left was specialized in “understanding,” a rough and ready characterization that carries into our own time. In the 1970s and 1980s, the “split brain” became a hot topic in neuroscience, and soon popular wisdom produced a flood of books explaining how the left brain…
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