Why violence has declined? The murder rate of Medieval Europe was more than thirty times what it is today. Slavery, sadistic punishments, executions were unexceptionable features of life. Wars between developed countries have vanished, and even in the developing world, wars kill a fraction of the people they did a few decades ago. Rape, battering, hate crimes, deadly riots, child abuse, cruelty to animals—all substantially down.
We've all asked, "What is the world coming to?" But we seldom ask, "How bad was the world in the past?" In this startling new book, the bestselling cognitive scientist Steven Pinker shows that the world of the past was much worse. In fact, we may be living in the most peaceable era yet. http://www.goodreads.com/book/show/16076785-the-better-angels-of-our-nature