David Henderson argues that blackmail should be legal. I'm not so sure. Here's David: One pair that I would like to hear from on this are Georgetown University philosophers Jason Brennan and Peter Jaworski. They wrote a book titled Markets Without Limits. The description of their book on Amazon states their thesis: “the question of what rightfully may be bought and sold has a simple answer: if you may do it for free, you may do it for money.” Although I...