Creativity has not only made the human race unique in nature; what is more important for the individual, it gives value and purpose to human existence. Creativity requires more than technical skills and logical thought; it also needs the cultivation and collaboration of the appositional (right hemispheric specific processes) mind. Having two modes of thought so segregated is advantageous, depending on the extent to which the corpus callosum mediates the ideational, as well as the sensory-motor gap between the two sides of the brain. Put differently, possession of two independent problem-solving organs increases the prospects of a successful solution to a novel situation although it has the hazard of conflict in the event of different solutions. (Bogen, Joseph, Dr., and Glenda Bogen, The Other Side of the Brain III: The Corpus Callosum and Creativity.
Refer to Creativity and the Brain for additional information.