Men have been barbarians much longer than they have been civilized. They are only precariously civilized, and within us there is the propensity, persistent as the force of gravity, to revert under stress and strain, under neglect or temptation, to our first natures.
Too often, our minds are locked on one track. We are looking for red - so we overlook blue. Many Nobel Prizes have been washed down the drain because someone did not expect the unexpected.