Yuval Harari of Hebrew University and author of Sapiens talks with EconTalk host Russ Roberts about the history of humanity. Topics discussed include the move from hunting and gathering to agriculture, the role of fiction in sustaining imagination, the nature of money, the impact of empires and the synergies between empires and science.

Pete Boettke of George Mason University talks with EconTalk host Russ Roberts about the political and economic lessons he has learned as program director of research in the aftermath of Hurricane Katrina. In this wide-ranging conversation, Boettke discusses the role of civil society, the barriers to recovery that have hampered New Orleans and what worked well as people and institutions responded to tragedy and devastation.

Tim O'Reilly of O'Reilly Media talks with EconTalk host Russ Roberts about his career in technology and media and the challenges facing low-wage workers as technology advances. Topics include the early days of the Internet, the efficacy of regulation to protect workers, and the poetry of Elizabeth Bishop.

When Lewis and Clark crossed through Montana, they encountered an extraordinary cornucopia of wildlife. Most of that ecosystem and the animals that once thrived there are gone. But a non-profit wants to bring it all back. Pete Geddes, Managing Director of the American Prairie Reserve talks with EconTalk host Russ Roberts about creating the Serengeti of the Americas--a 3.3 million acre prairie that would allow bison, pronghorn antelope, prairie dogs and their friends to inhabit a Wildlife Reserve in Montana, the size of Connecticut. Geddes discusses the goals of the American Prairie Reserve and how they're using a for-profit company, Wild Sky Beef, to gather support and help from local ranchers for the project.

There is only one country in the world where a person can sell a kidney to another citizen who buys it. That country is Iran. Tina Rosenberg of The New York Times talks with EconTalk host Russ Roberts about the Iranian kidney market--how it works, its strengths and weaknesses, and whether its lessons apply to the United States or elsewhere.

Ever wonder what goes on behind the scenes at a Broadway show? This week's EconTalk lifts the curtain on the magical world of Broadway: Mitch Weiss, co-author of The Business of Broadway, talks with EconTalk host Russ Roberts about his book and what it's like to manage the production of a blockbuster musical in New York City. Topics discussed include the eight-performance-per-week grind, the how and why of creating a Broadway set, the challenges of wardrobes (domestic and international) and the pluses and minuses of unions which are a central part of the Broadway workplace.

How much care do you take when you make a donation to a charity? What careers make the biggest difference when it comes to helping others? William MacAskill of Oxford University and the author of Doing Good Better talks with EconTalk host Russ Roberts about the book and the idea of effective altruism. MacAskill urges donors to spend their money more effectively and argues that the impact on human well-being can be immense. MacAskill wants donors to rely on scientific assessments of effectiveness. Roberts pushes back on the reliability of such assessments. Other topics include sweatshops, choosing a career to have the biggest impact on others, and the interaction between private philanthropy and political action.

Are human beings naturally cooperative or selfish? Can people thrive without government law? Paul Robinson of the University of Pennsylvania and author of Pirates, Prisoners and Lepers talks with EconTalk host Russ Roberts the ideas in his book. Robinson argues that without government sanctions or legislation, there is an evolutionary drive to cooperate even in life-and-death situations. In such situations private punishment and norms play a crucial role in sustaining cooperative solutions. The last part of the conversation deals with the criminal justice system and how attitudes toward the system affect society-wide cooperation and crime.

Thousands of bears in New Jersey. Humpback whales near New York City. Acres devoted to farming stable or declining even as food production soars. Jesse Ausubel of the Rockefeller University talks with EconTalk host Russ Roberts about the return of nature. Ausubel shows how technology has reduced many of the dimensions of the human footprint even as population rises and why this trend is likely to continue into the future. The conversation concludes with Ausubel's cautious optimism about the impact of climate change.

Rachel Laudan, visiting scholar at the University of Texas and author of Cuisine and Empire, talks with EconTalk host Russ Roberts about the history of food. Topics covered include the importance of grain, the spread of various styles of cooking, why French cooking has elite status, and the reach of McDonald's. The conversation concludes with a discussion of the appeal of local food and other recent food passions.