Journalist and historian in war studies Gwynne Dyer discusses his book "Climate Wars: The Fight for Survival as the World Overheats," presented by Harvard Book Store. Dyer explores the cultural and political ramifications of climate change, such as dwindling resources, population shifts, natural disasters, epidemics, crashing economies, and political extremism. More lectures at forum-network.org This talk took place on September 16, 2010.