How detailed do we need to understand the way the brain works for Darwinian literary studies?
Dehaene, in Reading in the Brain goes into great detail about how the brain is converted into an organ able to read and create written script, yet one may wonder to what degree this is in fact helpful to understanding literature per se.
Having said that, I will note that Dehaene does observe that learning to read makes us more phonemicly aware -- which may in fact affect the production of poetry. At the same time, one may argue that one could learn this through studies that do not involve understanding the neurology behind reading.
There is certainly something to be said about the issues of general intelligence and evolutionary psychology's emphasis on modules and instincts -- but how much does one really need to know about neural structures to use these in literary studies?