Philosopher and nonviolent activist Lanza Del Vasto discusses his work as a nonviolent activist and his book "Return to the Source." Terkel refers to del Vasto as "Shantidas" occasionally during the interview.

E.F Donahue discusses his book "The Higher Animals". Donahue goes into depth about the characters in his book and touches on the subjects of evolution, history, literature, and his life. H.E.F.

Garry Davis, an international peace activist and founder of the World Government Authority, discusses his philosophy on world peace and his stance on being a world citizen.

Studs Terkel plays interview clips of actors [Marcello Mastroianni and Alain Cuny] and the director Federico Fellini discussing their film "La Dolce Vita" and the character Steiner. At the beginning of the program Studs Terkel interviews Nelson Algren, a writer, and Mario Devecki (a person who made the film "La Dolce Vita" happen) about La Dolce Vita and Steiner.

Edwin T. Buehrer, a Unitarian minister, discusses Unitarianism, his book "Changing Climate of Religion", and human problems. They also discuss humanity, religion, life on other planets, science, and the universe. Includes a clip of Arthur C. Clarke speaking about the universe and life on other planets. Includes a clip of a boy talking about who he thinks God is. Includes a clip of a boy talking about the fall of Rome.

Dr. Jacob Bronowski, a mathematician and philosopher, discusses how the study of science has changed since the onset of government regulation or the military industrial complex. He also talks about humanity and explains how humans are the best species and therefore should come together to continue progress instead of killing each other. Content Warning: This conversation has the presence of outdated, biased, offensive language.

Studs interview with Dieter Lattman, German author and journalist. They discuss the powerful influence that German intellectuals have over the general public and how this led to the silent acceptance and ignorance of concentration camps and euphemism in Germany pre WWII. Littman praises William Shirer's book, "The Rise and Fall of the Third Reich" but warns that he did not know about the average German family. Littman shares some of his memories as a German youth living during the Nazi reign. Interview takes place in Germany.

Discussing the book "Margaret Mead and Samoa the making and unmaking of an anthropological myth" with the author Derek Freeman.

Danilo Dolci discusses his life in Italy, his book "The Man Who Plays Alone", architecture, agriculture, social activism, his inspirations, and his career. Tom Cornell translates for Danilo Dolci. Includes at the end of the program an Italian song by Jerre Mangione and an Italian song called "Bella Ciao".

Evolution and the future of the human race are among topics in Carl Sagan's and Ann Druyan's book, "Shadows of Forgotten Ancestors: A Search for Who We Are." Included is an excerpt of the astronomer Harlow Shapley speaking at the beginning. Carl Sagan also reads an excerpt from the book at the end.