Abstract
The question I address in this article is whether it is morally wrong for a lawyer to represent a client whose purpose is immoral or unjust. My answer to this question is that it is wrong, prima facie. This conclusion holds, even accepting certain traditional principles of lawyer's professional ethics, such as the right of defence and the so-called principle of ‘adversarial’ litigation. Both the adversarial system and the right of defence are sufficient to support or justify the right of potential clients to defend their interests in the judicial system and to do so with the technical assistance of a lawyer. This right includes a right to pursue unjust or immoral purposes. However, having a right to do X does not mean that it is morally permissible to do X. We can have a right to do something morally wrong. This being so, the fundamental moral reason for a lawyer not to accept representation for a client with an immoral purpose is that it is, prima facie, morally wrong to help someone do something wrong