We are probably living in the most peaceful era in the history of our species, author Steven Pinker says. That may be hard to believe for regular viewers of the evening news. But the Harvard psychologist's research finds that when it comes to war, genocide, capital punishment, rape, hate crimes and slavery, things are definitely looking up. Pinker joins us to discuss his latest book "The Better Angels of Our Nature." Do you think global violence is on the decline?
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Steven Pinker, experimental psychologist and professor at Harvard University, and author of "The Better Angels of Our Nature: Why Violence Has Declined"