I argue in this article (i) that Karl Olivecrona's legal philosophy, especially the critique of the view that law has binding force, the analysis of the concept and function of a legal rule, and the idea that law is a matter of organized force, is a significant contribution to twentieth century legal philosophy. I also argue (ii) that Olivecrona fails to substantiate some of his most important empirical claims, and (iii) that the distinction espoused by Olivecrona between the truth and (...) the correctness of legal statements is problematic but not needed in Olivecrona's legal philosophy. (shrink)