"The Better Angels of our Nature" by Steven Pinker shows that this is the least violent time in history. http://www.amazon.com/The-Better-Angels-Our-Nature/dp/

"The Better Angels of our Nature" by Steven Pinker shows that this is the least violent time in history. http://www.amazon.com/The-Better-Angels-Our-Nature/dp/0143122010/ref=tmm_pap_title_0 http://www.amazon.com/The-Better-Angels-Our-Nature/dp/014312...