Why are we our own worst enemy? In the twentieth century, 170 million human beings have died in wars. That makes 4630 casualties a day, 193 every hour, and three every minutes. 1035 billion dollars were spent on aid to developing countries. Russia and the U.S. boast 3.6 and 5.9 wars each generation respectively - that is 49.3 and 48.3 years of warfare for each generation. The Most Dangerous Animal takes the reader on a journey through evolution, anthropology and psychology and asks what it is about human nature that makes war possible. Meticulously researched, far-reaching in scope, and with many stunning examples, The Most Dangerous Animal delivers a sobering lesson for an increasingly dangerous world.