Introduction. A German lawyer Rudolf von Ihering (it. Rudolf von Jhering, August 22, 1818, Aurich – September 17, 1892, Göttingen) is the founder of the realist theory of law and state, the essence of which involves the direct implementation of scientific postulates to the realities of life, and thus to strive to combine theory and practice. It is not by chance appear to be a actuality and practical significance of the realist theory of law which, in contrast to other areas of legal thought, the most widespread only in certain historical periods, requires continuity and constant reproduction. Analysis purposes in law as a legal category in the philosophical understanding offered by Jhering still is genuine interest. Purpose. The main purpose of this paper is a theoretical reflection on the realist postulate: the goal is the creative force of all law that there is no legal provision that would not have originated any purpose. Results. It is stated that to Jhering no one has previously applied to the study and justification of the law, but the concept of “purpose” pervades all aspects of life: from the face leads to the property; from both of them to the right; from the right to the state. Conclusion. The ultimate goal of the right to put a reward on the line with punishment, “punitive” law corresponds to the “premium”, the latter corresponds to the principle of fairness of the social order.