How much of ourselves are we obligated to share with others, and what do we have a right to keep hidden? Sarah Igo of Vanderbilt University joins us to talk about those questions and others, which she explores in her new book “The Known Citizen: A History of Privacy in Modern America” (Harvard University Press).
![](https://think.kera.org/wp-content/uploads/2018/07/shutterstock_1039120300-800x500.jpg)
Shutterstock