Steven Pinker, Author of ''The Better Angels of Our Nature: Why Violence Has Declined''

Pinker raises the crucial question ''has violence in society declined''? Despite what many people think, he argues that we may be living in one of the most peaceful times since our existence. Pinker is one of the world's leading experts on language and the mind. He looks throughout history and examines how the decline in violence has transformed our society and offers his thoughts on the continuation for future generations.