The core idea of libertarianism, considered as a basic moral theory, is that people have certain negative rights and that those rights determine morally right action. Libertarianism is supposed to provide robust explanations to some of our intuitions, such as that it is wrong to steal, kill, rape or enslave other people. However, its exclusive focus on negative rights (i.e., rights to non-interference) makes it incapable of explaining some other intuitions, such as that the utterly rich should help the utterly poor. Although libertarianism can explain why we should never do bad to others, it cannot explain why we should sometimes do good to others. For this reason, libertarianism is not satisfactory as it stands. A natural suggestion, therefore, is that we should either abandon libertarianism in favor of some of its better faring rivals, or revise the theory in order to get rid of the features that make it unsatisfactory.