processes.
Since human brain evolution occurred in the context of an arboreal lifestyle requiring integrative perception, a capacity for figure-ground (stereoscopic) visual distinctions and internal memory to correct for visual and acoustical vagaries in the trees, it tends to bring ideas together into common focus. In that sense the primate brain template provided us with a penchant for integrative thought. On the other hand the latest primate brain revision providing new circuits to facilitate upright walking seems to have led to a bifurcated human mind, featuring a left-right motor cadence requiring separate inhibition-excitation sequences. This process was converted to other functions and led to an enhancement of discrimination and attention capacities. While all creatures can learn to distinguish between stimuli, the finely tuned alternating/competing capacities to separate and integrate experiences appears to play a significant role in th development of both the personality and human culture.
One can see the bimodal mind in action in virtually all human endeavors. For example the ability to put circuit A on hold while circuit B is activated enables the Eskimo not only to walk upright but to describe 12 different kinds of snow. Meanwhile the fact that humans can weave experiences together enables the rest of us to understand that snow consists of one chemically configuration and is simply water at a different state of temperature.
Thus we seem to shift back and forth between convergence and divergence in our actions, thoughts, beliefs and prayers and perhaps the course of human history is partly determined by which of those two trends is emphasized and championed by society at any given time.
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