Bonding & rivalry

"It seems to me a possibility that those emotions which are related to bonding and empathy, whether we call them 'positive' or 'negative', are preferentially treated by the right hemisphere, as one would expect: such stimuli capture right-hemisphere attention. By the same token, those to do with competition, rivalry and individual self-belief, positive or negative, would be preferentially treated by the left hemisphere." (The Master and His Emissary, Iain McGilchrist, 2009; page 63).