David Livingstone Smith is an author of non-fiction books about human nature and evolutionary psychology. He explores the negative aspects of humanity in an attempt to explain cruelty and war.
"Like it or not, war is distinctively human. Apart from the raiding behavior of chimpanzees and the so-called wars prosecuted by certain species of ant, there is nothing in nature that comes anywhere near approximating it."
– David Livingstone Smith, The Most Dangerous Animal: Human Nature and the Origins of War