check out Ted talk by Steven Pinker
tinyurl.com/I8mvzd
Steven Pinker: A brief history of violence
http://www.youtube.com/watch?v=ramBFRt1Uzk&feature=PlayList&p=AC463A2B6B2CEC7F&playnext=1&playnext_from=PL&index=3
Then look at:
tinyurl.com/3bcryc
his article "We're getting nicer every day.
