Animals rarely kill their own. Whereas in the twentieth century alone, humans have slaughtered more than 200 hundred million of our own kind. Why are we so different? It hasn't always been like this. For almost our entirely existence humans were just like other animals. How did we get to be this uniquely violent species?
This is a short excerpt from a talk by Jeffrey Masson PhD, entitled "Beasts: What Animals Can Teach Us About the Origins of Good & Evil."
[watch video below]