Joan Cook discusses her book "In Defense of Homo Sapiens" and talks about research done by other scientists working with Chimps and other primates. She explains her stance that not all humans lean towards violence and that nature, not nurture, and the environment creates aggression and violence. The conversation compares economics and Darwinism for a view of humanistic economics.

Studs Terkel interview with James Cameron, Brittish journalist. They discuss the objective truth and facts of journalism. Cameron shares his experience with a dying Winston Churchill and his views on science and human values. Politics, youth, and the atomic bomb are also topics in this interview. Studs quotes Albert Einstein and Sidney Burnstein, while Cameron quotes Oliver Cromwell. James Cameron's book, "Point of Departure" is also mentioned in the interview.

Discussing the television program "The Living Planet," with broadcaster David Attenborough.

Bill McKibben, author and environmentalist discusses his book "The End of Nature." McKibben talks about climate and weather, greenhouse gasses, fossil fuels, chlorofluorocarbons, and carbon dioxide. He also explains how climate change could damage the ecosystems including birds. He ends the interview discussing what can be changed such as solar power.