repeating rifle came into being, with the reduced the guarantee if you are a better swordsman nor markman-- marks many would prevail because somebody could carrier for a great distance. but from the first world war, that to inability of one's own ability to have anything to do with whether you survive or not was so extreme and never known before because most people who were injured were not killed by a machine gun fire but artillery shells which burst into shrapnel scattering hundreds of pieces of hot steel in all directions. this was filed from several miles away. it doesn't matter how heroic you were charging across the battlefield, you were killed by something by eight something you couldn't see and that was very modern and even more so today. [applause] >> university of chicago professor at john mearsheimer who do politicians like to? >> guest: tutu audience is. they lie and two other leaders and their public. number two, they like to their own people. >> host: to whom do they tell the truth? >> guest: they tell the truth often and in fact, politicians and leaders like to a foreign au