Steven Pinker: Threats, Bribes, and Come-ons...

Steven Pinker is a Professor in the Department of Psychology at Harvard University. Among many other subjects, he researches and explores cognition, language and the history of human violence. In his off-hours, he appears on "The Colbert Report" where he endures endless jokes about his hair from host Stephen Colbert.
Aired: 12/26/2013 | 0:01:54