Thanks to this confirmation bias, I knew the starting premise of Steven Pinker's The Better Angels of Our Nature: Why Violence Has Declined -- that "violence has declined over long stretches of time, and today we may be living in the most peaceable era in our species' existence" -- before I cracked the book, having read various interviews, Pinker articles and responses. And yet, within pages of the beginning, I could feel the book changing my world view - sweeping away the vestiges of ancestor worship, golden age nostalgia, boomer guilt, and who knows whatever other mental gestures of obeisance to outmoded authority. This effect began to register in Pinker's preface:
How, in particular, are we to make sense of modernity of the erosion of family, tribe, tradition, and religion by the fores of individualism, cosmopolitanism, reason, and science? So much depends on how we understand the legacy of this transition: whether we see our world as a nightmare of crime, terrorism, genocide, and war, or as a period that, by the standards of history, is blessed by unprecedented levels of peaceful coexistence (location 138)...The belief that violence has increased suggests that the world we made has contaminated us, perhaps irretrievably. The belief that it has decreased suggests that we started off nasty and that the artifices of civilization have moved us in a noble direction, one in which we can hope to continue (location 142).