Nature or nuture? How much of who we are is directly related to our genes, our parents, families or friends, or what is happening around us? Kevin Drum wants us to look more at how our history of lead has profoundly shaped our society. Indeed, it seems that all the Guillani policing "innovation" has not had nearly the effect on crime as cleaning the environment. All those tough on crime laws had little to do with bringing down crime. That's pretty profound.