Anger!

Where does 'anger' fit in our survival scheme of things? Its genesis can be fairly judged; after all there was a need for emotional response to provocation and 'anger' is manifestation of that response. Anger, apparently is primal, preceding arrival of modern man. Anger is also universal; all creatures who can display emotions also express anger. One can understand the need of analytical resources required to understand dynamics of ‘anger’ therefore its prevalence in animals is understandable but Man?
Man has have evolved with time adapting and assimilating with experience best ways that help in his survival therefore our surrender to ‘anger’ is incomprehensible. Surely our complex mind must have realized the destructive nature of ‘anger’. Anger inhibits rational thinking therefore restricts best retaliation to provocation. This is very elementary conclusion therefore our mind should have figured this out and gradually blunted its persistence. Indeed ‘anger’ cannot be eliminated but our evolution with time must have allowed its quick dissipation rather than its snowballing feature!