Devyatko I.F. Chapter 1. Social Norms: from Attempts of Definition Towards new interpretations of Sources of Normative value and plurality of normative Systems. In:Norms and Morality in Sociological Theory: From Classical Conceptions to New Ideas. Moscow: Ves' Mir, 2017 Devyatko I.F. Chapter 1. Social Norms: from Attempts of Definition Towards new interpretations of Sources of Normative value and plurality of normative Systems. In:Norms and Morality in Sociological Theory: From Classical Conceptions to New Ideas. Moscow: Ves` Mir, 2017Глава из книги: Нормы и мораль в социологической теории: от классических концепций к новым идеям: [монография] / [И.Ф. Девятко и др.]; Отв. ред. И.Ф. Девятко, Р.Н. Абрамов, И.В. Катерный. – М.: Весь Мир, 2017 – 288 с.ISBN 978-5-7777-0706-2Posted on site: 01.12.17AbstractWhile many past theoretical discussions on nature of social norms were centered on a problem of their precise definition, I propose an analysis of peculiar character of sociological theorizing about norms which is grounded in a wider interdisciplinary context (particularly, on sociologically relevant implications from H.L.A. Hart’s and H. Kelsen’s views on law and norms) and based on systematization of principal norm-related questions which varying types of theories attempt to answer, i.e., nature of norms, social mechanisms of their maintenance and change, analytic and empirically-based distinctions between norms and rules and conventions, irreducible complexity of norms, etc. Besides, the chapter presents a systematic review of classical and modern approaches to elucidation of intricate relations between multiple normative systems, e.g., law and morality. I also discuss some recent arguments against moral relativism in social sciences brought forward by S. Lukes.