My suggestion is that brain laterality evolved it's twin dominances in order of maximizing the natural selection of DNA complexity over the selection of specie traits within specie life. It should be most unsettling for the right-handed to contemplate that Left-handedness occupies half the brain in dominance but is only 10% of human populations, while right-handedness occupying only half the brain in dominance is 90% of human populations. It is most unreasonable to accept that left-handedness has a very minor evolutionary role when it clearly evolved from small asymmetrical origins to half the brain in dominance. I have set out a few of my statements/conclusions on my site. WWW.Cerebralspeciation.com At this time and for 16 years since i first mentioned this concept it has been ignored by those who have been commissioned with the task of finding the solution to brain laterality. Clearly a bonefied qualified scientist is no indication of success in humanities struggle for understanding. Creation scientists are the obvious example. It is clear that the scientific degree can be corrupted and turned against the very ideal's that most scientists hold dear to their heart's. The human situation demands to be resolved, yet left-handedness which is a minor prelude to the human situation is unresolved. The human situation that lies in the future is an impossible task if the, (so called), little scientific conundrum of left-handedness is causing so much confusion. Ian K Pennack.