The world has gone to hell. As historians know, anarchy is usually followed by a dictatorship, and a dictatorship is what the world needs. The mighty Caesar will conquer all the warring tribes that the NCR can't deal with and unite the world under one banner.
Yes, it will eventually crumble, but with the inevitable transition into war, larger groups will form that will become countries, which is what needs to happen opposed to keeping the multitudes of small tribes around. With countries united (probably against one another), they will then make scientific and social advances to out-do one another, thus improving human society.
Ok, so there's a little slavery, rape, and crucifixion on the way to human advancement, but the ends justify the means.
Ave, true to Caesar.