Hans Kelsen: aportaciones teóricas de la teoría pura del Derecho
The main purpose is to briefly introduce Kelsen’s contributions to different fields of legal, philosophical and sociological thinking. Thus, the article explains the concept of methodological purity and also exposes the conceptual construction, outlined in the «Capital Problems...» (Hauptprobleme), of law as a coercive order and the concept of attribution (Sollen). It describes the thesis of the identity of Law and the State, and shows how to juridically introduce and solve problems regarding the State. It briefly discusses the State forms and their relationships with different worldviews. The first edition of the Pure Theory of Law and the publication of the General Theory of Law and the State are mentioned. The contributions to the theory of the constitution and international law are presented; in the same way all the essays on the philosophy of Plato are listed and the origin of the law of causality from normative concepts, especially the principle of retribution. It mentions the critics of the political and legal theory of Marxism and communism.