Jared Diamond’s new book, The World Until Yesterday, is completely wrong, writes Stephen Corry. Diamond argues that industrialized people (‘modern’) can learn from tribal peoples (‘traditional’) because they show how everyone lived until a few thousand years ago. Corry agrees that ‘we’ can learn from tribes, but counters they represent no more of a throwback to our past than anyone else does. He shows that Diamond’s other—and dangerous—message is that most tribes engage in constant warfare. According to Diamond, they need, and welcome, state intervention to stop their violent behavior. Corry argues that this is merely a political opinion, backed by questionable and spurious data. He sees Diamond’s position as one of supporting colonial ideas about ‘pacifying savages’ and says it is factually and morally wrong.