Роберт Михелс (на немски: Robert Michels) е германскисоциолог, който изследва политическото поведение на интелектуалните елити и доразвива Теорията за елита. Известен е с книгата си „Политическите партии“, която описва т.нар. „Железен закон на олигархията“. Политически той преминава от социалдемокрацията към революционния синдикализъм, а по-късно към Италианския фашизъм.
Proletariato e la borghesia nel movimento socialista italiano (1908; 1975)
Zur Soziologie des Parteiwesens in der modernen Demokratie. Untersuchungen über die oligarchischen Tendenzen des Gruppenlebens (1911, 1925; 1970). Translated, as Sociologia del partito politico nella democrazia moderna: studi sulle tendenze oligarchiche degli aggregati politici, from the German original by Dr. Alfredo Polledro, revised and expanded (1912). Translated, from the Italian, by Eden and Cedar Paul as Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracy (Hearst's International Library Co., 1915; Free Press, 1949; Dover Publications, 1959); republished with an introduction by Seymour Martin Lipset (Crowell-Collier, 1962; Transaction Publishers, 1999, ISBN 0-7658-0469-7)
Grenzen der Geschlechtsmoral. Italian translation, Morale sessuale; versione dal tedesco del dott revised and expanded by Alfredo Polledro (Fratelli Bocca, 19 – ?). Translated as Sexual Ethics: A Study of Borderland Questions (Walter Scott, George Allen & Unwin, Charles Scribner's Sons, 1914); republished with a new introduction by Terry R. Kandal (Transaction Publishers, 2001 – 2, ISBN 0-7658-0743-2)
Probleme der Sozialphilosophie (1914)
Imperialismo italiano, studi politico-demografici (1914)
Amour et chasteté; essais sociologiques (1914)
Organizzazione del commercio estero (1925)
Sozialismus und fascismus in Italien (1925)
Storia critica del movimento socialista italiano: dagli inizi fino al 1911 (La Voce, 1926)
Corso di sociologia politica (1927). Translated, and introduced by Alfred de Grazia, as First lectures in political sociology (University of Minnesota Press, 1949; Arno Press, 1974, ISBN 0-405-05515-3)
Sittlichkeit in ziffern? Kritik der moralstatistik (1928)
Patriotismus, prolegomena zu seiner soziologischen analyse (1929)
Einfluss der faschistischen Arbeitsverfassung auf die Weltwirtschaft (1929)
Italien von heute; politische und wirtschaftliche Kulturgeschichte von 1860 bis 1930 (1930)
Introduzione alla storia delle dottrine economiche e politiche (1932)
Boicottaggio, saggio su un aspetto delle crisi (1934)
Boycottage international (1936)
Verelendungstheorie; Studien und Untersuchungen zur internationalen Dogmengeschichte der Volkswirtschaft, witha foreword by Heinz Maus (1970)
Elite e/o democrazia (G. Volpe, 1972)
Antologia di scritti sociologici; edited by Giordano Sivini (1980)
Works on paper, 1918 – 1930 (Barbara Mathes Gallery, 1984)
Critique du socialisme: contribution aux débats du début du XXè siècle; articles selected and presented by Pierre Cours-Salies and Jean-Marie Vincent (Editions Kimé, 1992, ISBN 2-908212-43-9)
„Robert Michels And the „Iron Law of Oligarchy“, chapter 12 of Revolution and Counterrevolution: Change and Persistence in Social Structures by Seymour Lipset Martin
Entwicklung zum faschistischen Führerstaat in der politischen philosophie von Robert Michels by Frank Pfetsch (1965)
Robert Michels; vom sozialistisch-syndikalistischen zum faschistischen Credo by Wilfried Röhrich (Duncker & Humblot, 1971, ISBN 3-428-02610-1).
Organizzazione, partito, classe, politica e legge ferrea dell'oligarchia in Roberto Michels by Giorgio Sola (1972)
Sociology and estrangement: three sociologists of Imperial Germany by Arthur Mitzman (Knopf, 1973, ISBN 0-394-44604-6). Republished with a new introduction by the author (Transaction Books, 1987, ISBN 0-88738-605-9).
The anti-democratic sources of elite theory: Pareto, Mosca, Michels by Robert A. Nye (SAGE, 1977, ISBN 0-8039-9872-4).
Dilemmi della democrazia moderna: Max Weber e Robert Michels by Francesco Tuccari (Laterza, 1993, ISBN 88-420-4243-9)
Intelectuales, masas y élites: una introducción a Mosca, Pareto y Michels by María de los Angeles Yannuzzi (UNR Editora, 1993, ISBN 950-673-041-5).
Robert Michels: die Herausbildung der modernen politischen Soziologie im Kontext von Herausforderung und Defizit der Arbeiterbewegung by Joachim Hetscher (1993)
Robert Michels und das eherne Gesetz der Oligarchie by Gustav Wagner in „Wer wählt, hat seine Stimme abegeben“ Graswurzel Revolution pp. 28
((en))Robert Michels – Oligarchy, извадка от сб. The Sociology of Organizations: Basic Studies, ed. Oscar Grusky and George A. Miller (Free Press, 1970, pp. 25 – 43). Препечатано от Political Parties