I’ve always felt that the natural path of development for humanity is to grow less and less violent over time, in spite of the recent phenomena which I can only describe as “violence hysteria”. Finally, some data and a very educational talk to share. Steven Pinker, experimental psychologist and cognitive scientists was invited to talk on TED three times: in 2003, 2005 and 2007. In his latest talk, he presents data proving that we leave in the most peaceful of all times, and delves into the question of why it is so commonly perceived that the level of violence has been rising in the 20th century.
Original video on TED.com (might be better quality).