Theory of Legal Norms (Italian: Teoria della Norma Giuridica) is a book, published in 1958, by the Italian jurist Norberto Bobbio about one of the ontological elements of foundations of law — the legal norm.
Seen by scholars as an important work[1][2] in understanding of a conceptual constructivist approach of the scientific way of thinking law in the new era of the jurisprudence of values, Bobbio's book faces this challenge in six chapters.
"In this book, Bobbio defends a positive philosophy committed to the scientific soul and against metaphysical points of view.
Analyzing sanction under the point of view of efficacy, the relation between law and force appears.
"[5] "In this book, Bobbio analyzes the law as rule of behavior, showing a general view and a criticism of the various theories that intend to reveal the concept of law, concluding that, although all the theories are integrated, the normativist one prevails in sense of constituting pressuposed of validity for the other ones"[1]