Every day, it seems like there’s a new story about privacy: A Facebook hack that puts the private data of millions at risk. A years-long surveillance program of personal communications by the government. Endless concerns about how much of our lives we share on social media.

With all this in the air, it can certainly feel like we have a lot less privacy nowadays. But is that really the case? Well, according to Vanderbilt professor Sarah Igo, author of “The Known Citizen: A History of Privacy in Modern America,” the answer is actually pretty complicated.