Tribalism has made politics so awful I was forced to write a book about it. Well, fine. Fine. This book explores the evolutionary roots of loving our team and hating the enemy team, and why groupish caveman instincts linger in our minds today. It answers: If tribalism is hardwired into us, what changed in the last twenty years? How did partisanship get so loud, toxic, and obnoxious, and ruin last Thanksgiving? Finally, it says what we can do about it as individuals navigating relationships, and as society as a whole. "Tribalism is Dumb" will make you less flummoxed by partisanship, political loudmouths, and dogmatic pundits. It will make you taller, slimmer, and more attractive to everyone you could legally hit on. And it will make you better equipped to navigate tribalism in the wild.