Hacker, William Haseltine, Eli Jacobs, Bruce Kovner, Robert Loomis, Gary Lucas, John Micklethwait, Frederick Mocatta, Andrew Rosenberg, Curt Sawyer, Sean Wilentz, and Ezra Zilkha. I am especially grateful to Harold Edgar, the Julius Silver Profes- sor in Law, Science, and Technology at Columbia Law School; an