ON THE TWO CONCEPTS OF NATURAL LAWOF POLISH PHILOSOPHERS OF LAW IN THE INTERWAR PERIODThe first part of the article describes classification methods of the natural law concept in Polish philosophical and legal literature carried out based on the historical and systemic criteria. The first method allows analysing the ius naturale idea in its various cultural conditions at various stages of development of doctrines that the issue considers. The second method presents the phenomenon of natural law in the context of a comprehensive philosophical system. The Polish philosophical and legal thought has developed three systemic approaches to natural law: neo-Thomism in the style of the Lublin school of philosophy, psychologism by Leon Petrażycki an...