yes. well, one of the chapters is on war across the world. there are other chapters on crime, on tribal warfare, on cruel practices, like burning heretics at the stake or executing 7-year-old girls for shoplifting, slavery, blood feuds, dueling debtors prisons, and another one on the decline of old-fashioned wars between two armies from two nations, which have almost disappeared off the face of the earth. the remaining wars are almost all civil wars. so violence has gone down on a lot of scales. everything from world wars down to the treatment of animals and children. people spank their children less. there are fewer the practice of lynching has been eliminated in the united states. it used to take place at the rate of 150 lynchings per year. the imprisonment of homosexuals has been eliminated in much of the world. so at many, many scales, violence seems to be in decline,