As a state grows, it always tries to find more ways to limit the freedom of its people. In the best case, this might take the form of pervasive surveillance and perpetual nudges. Yet it rarely stops there. The state might decide to support ill-advised adventurism overseas, establish secret police to track and punish dissenters, or worse. Really, there's no limit to the atrocities a large state can visit upon its own people or the rest of the world. Keeping the state limited requires eternal vigilance, but the tendency is for it to grow out of control nonetheless. One obvious method to check...