Can a phone be a cow? It could in 1990s Bangladesh. This was the insight of a small number of mobile phone market pioneers who helped catalyze the spread of the greatest technological revolution in human history. Listen as George Mason University economist Philip Auerswald speaks to EconTalk's Russ Roberts about how the extension of connectivity to traditionally excluded populations led to wide-scale transformations in productivity. They discuss the role of little-known entrepreneurs such as Iqbal Quadir and innovators like Claude Shannon in bringing the mobile phone to the entire world. Other topics include William Nordhaus's paper on the cost of illumination as a powerful metric of human progress, Schumpeter's notion of innovation as new combinations, and what Auerswald calls the most important question the field of economics can ask: How much of human progress is inevitable, and how much depends on the determination of remarkable individuals?

Skin cancer comes from the sun. But so do many good things, according to author Rowan Jacobsen. Jacobsen talks with EconTalk's Russ Roberts about the health benefits of sunshine and makes the case for prudent sun exposure. Topics discussed include the "heliotherapy" movement that peaked in the early 1900s in response to rickets and tuberculosis, why diagnosing skin cancer is on the rise, and why yesterday's sunscreens may have done more harm than good.

Finding community can be difficult. But author Luke Burgis thinks the real challenge begins once we've found it and we're subject to social pressures to conform. Listen as Burgis and EconTalk's Russ Roberts trace the tension between individuals and their tribes through the foundational frameworks, such as family and school, that help forge our identities. Burgis argues that the disappearance of traditional rites of passage bodes ill for major life commitments such as marriage, and recounts his personal journey from Wall Street through the Great Books in search of a strong, differentiated self. He also draws lessons for today's communities from Saint Benedict's 1,500-year-old guide for monastic life and describes the moving ritual he practiced with his father before he died.