From the sandbox to the skies above, ownership is everywhere, even if you don’t see it. In their new book, Mine! How the Hidden Rules of Ownership Control Our Lives, James Salzman, a professor at the Bren School of Environmental Science & Management, and co-author Michael Heller of Columbia Law School take an in-depth look at how we define ownership — and how it’s defined for us — and the various ways people lay claim to things. In a conversation with The Current, Salzman shared some insights into the ways conflicts around ownership impact our lives and how we can navigate them.