War has been a part of society for as long as society has existed. What has changed in your mind to make post-war era possible? Also does post war mean war nev

War has been a part of society for as long as society has existed. What has changed in your mind to make post-war era possible? Also does post war mean war never again happens? Or just happens less frequently? I truly believe a post war era (war not happening for millions of years) will not be possible without genetic mutation of the human genome.