Internationally known as the "father of peace studies", Norwegian sociologist Johan Galtung broke new ground in 1959 when he established the Peace Research Institute Oslo. In the past half century, Galtung has published over 150 books, including "The Fall of the U.S. Empire - And Then What?” and mediated in over 150 conflicts between states and nations.
In this episode of The Stream, we talk to Johan Galtung about his predictions of US decline, the Arab Spring, and his definition of "peace".
What do you think? Besides the absence of violence, what characterises peace? Send us your thoughts and comments on Facebook or Twitter using hashtag #AJStream.