Joseph Blocher and Mitu Gulati propose an insightful and thought-provoking critique of the barriers to secession under public international law. The critique an important contribution in its own right. I wish it had not been eclipsed by the authors’ clever and provocative fix: turning sovereignty into a tradable commodity. I suspect that this fix would bring about more suffering than the status quo for two reasons. First, a market for sovereign control is unlikely to be a market in any meaningful sense. Therefore, trading sovereignty would not discipline oppressors. Second, should something like a real market materialize, it could diminish the incentives for states to treat their populations better just as plausibly as it could improve them...