 In Part 2 of the “Conclusion” of the Enquiry, Hume raises a serious problem with his account of justice. While it is in our interest to have the practice of justice in place, it may not always be in our interest to obey its rules in every case. This is the free rider problem. The free rider, whom Hume calls the sensible knave, wants to get the benefits that result from having a practice in place without having to always follow its rules. He knows that the only way to obtain the advantages of social cooperation is for the practice of justice to be in place, but he also realizes that a single act of injustice will not significantly damage the practice. Most people will obey the rules of justice, so if he commits one act of injustice, the institution will not be in any danger of collapsing. Suppose he has the opportunity to commit an act of injustice that will benefit him greatly. Why shouldn’t he? 