Stephen Pinker is a cognitive psychologist, best-selling author and Johnstone Family Professor in the Department of Psychology at Harvard University. In his eighth book for a popular audience, Enlightenment Now (2018), Pinker provides hard data to show how “the human condition” has improved dramatically over the past 200 years. New and prevailing problems are not insurmountable, he argues -- as long as liberal democracies continue to embrace the Enlightenment-era ideals of reason, science, humanism, and progress. (Video)