this is not the possibility of a good guitarist dave hansen, but moreover, it may be unnecessary. very early in the investigation of biological evolution, but given the some of the developments that i discuss occur far too rapidly to be attributable such as the plunging of the crime rate in 1952 because something must happen that was not a genetic. so on grounds a parsenia figure we don't have any need for the hypothesis. there's also the genetic change. not ruling it out. >> emma terrible bullets speaker, so and a huge fan. i am curious about people's relationships with representatives democracy in civilian law enforcement, and it is interesting to hear what the declining rates of violence : at the same time things like paramilitary police was finance what teams that have gone way beyond their original intention as far as hostage situations and even last year breaking into homes over college loans. so if rates of violence are really declining why is the civilian law enforcement flexing their muscles in a way that doesn't correlate with the decline in violence? >> well, we have to