Photo of one of Edward Hicks' "The Peaceful Kingdom" paintings courtesy AllPaintings.org
According to the historical research by Steven Pinker, New College of the Humanities in London visiting professor and Harvard University experimental psychologist, we are now living in the least violent and most peaceful era in the history of the world.
For more information, see information on his book, The Better Angels of Our Nature, and his website, StevenPinker.com.
