Louis Brandeis started off by embracing the Theodore Roosevelt notion that hyphenated Americanism was unpatriotic. You couldn't have dual loyalties. But then he thinks and he reads and he becomes the head of the American Zionist movement after having previously been a secular Jew in this amazing intellectual evolution.

For [Louis] Brandeis, it's not a technical question of channeling what would James Madison say. It's how do we take these inherent human natural rights of liberty and translate them into an age of new technolog

Louis Brandeis really inspired me to write this book [Louis D. Brandeis: American Prophet]. It was a crazy deadline. The editor said I'd miss the hundredth anniversary unless I pumped the thing out in six months, because I'd been delaying and dilly dallying for so long. So he both inspired me to get up early and write.

[Tomas] Jefferson is more out of fashion, both because of his views on race, where he's properly questioned, that part of his legacy, but also because the libertarian critique of bigness in business and government, the idea that size is a danger is something that's shared on the right when it comes to government and on the left when it comes to corporations, but not both.

Louis Brandeis beloved uncle, Lewis Dembitz, was an ardent abolitionist. His mother was an abolitionist in Kentucky at a time when Brandeis remembered hearing the shot from the confederate soldiers after the second battle of Bull Run. Amazing to think that he heard that and I studied with one of his last law clerks in college. And that encapsulates almost all of American history.

I don't think he would have had any trouble answering Justice Sonia Sotomayor's excellent challenge in a case involving GPS surveillance. She said we need an alternative to this whole way of thinking about the privacy now which says that when you give data to a third party, you have no expectations of privacy. And [Louis] Brandeis would have said nonsense, of course you have expectations of privacy because it's intellectual privacy that has to be protected. That's my attempt to channel him on some of those privacy questions.

What is so inspiring about [Louis] Brandeis's writing is he saw it as a tool for democratic education. He would say things like the opinion is now convincing, now can we make it more instructive, after he'd gone through ten drafts.