Prof. Dr. Ralf Poscher


Curriculum Vitae

  • Spring 2022: Guest professor at the Factulté de Droit, Université Panthéon Assas, Paris 2, France
  • Since Novem­ber 2019: Hon­or­ary pro­fess­or­ship, Uni­versity Freiburg
  • Since May 2019: Dir­ect­or at the Max Planck In­sti­tute for the Study of Crime, Se­cur­ity and Law, Freiburg
  • Oc­to­ber 2018 to May 2019: Dean, Fac­ulty of Law, Uni­versity of Freiburg
  • Spring 2018: Guest pro­fess­or, Fac­ulté de Droit, Uni­versité Jean Moulin, Ly­on 3, France
  • Oc­to­ber 2015 to Septem­ber 2016: Rect­or’s Fel­low, Freiburg In­sti­tute of Ad­vanced Stud­ies (FRI­AS), Uni­versity of Freiburg
  • Winter semester 2013: Fernand Braudel Seni­or Fel­low, De­part­ment of Law, European Uni­versity In­sti­tute, Florence
  • 2013 to 2018: Man­aging dir­ect­or of the Centre for Se­cur­ity and So­ci­ety, Uni­versity of Freiburg
  • Oc­to­ber 2009 to present: Pro­fess­or, Fac­ulty of Law, Uni­versity of Freiburg, In­sti­tute for Polit­ic­al Sci­ence & Philo­sophy of Law, De­part­ment 2 (Philo­sophy of Law)
  • Decem­ber 2003 to Septem­ber 2009: Pro­fess­or, Fac­ulty of Law, Ruhr-Uni­versität, Bo­chum, Chair of Pub­lic Law, Legal So­ci­ology, and Leg­al Philo­sophy
  • 2007 to 2008: Mem­ber of the In­sti­tute for Ad­vanced Study, Prin­ceton, USA
  • Spring 2007: Re­search fel­low, Uni­versity of Osaka, Ja­pan
  • 2002: As­sist­ant pro­fess­or, Fac­ulty of Law, Hum­boldt-Uni­versität zu Ber­lin
  • 2002: Postdoc­tor­al de­gree ("Ha­bil­it­a­tion") with the ve­nia le­gendi for pub­lic law, his­tory of con­sti­tu­tion­al law, and leg­al philo­sophy at the Hum­boldt-Uni­versität zu Ber­lin; Ha­bil­it­a­tion Title: Grundrechte als Ab­wehr­rechte. Re­flex­ive Regelung recht­lich geord­neter Freiheit
  • 1999 to 2002: Postdoc­tor­al re­search fel­low, Fac­ulty of Law, In­sti­tute for Pub­lic Law, Chair Prof. Dr. Bernhard Schlink, Hum­boldt-Uni­versity Ber­lin
  • 1999: Hum­boldt Award, Hum­boldt-Uni­versity Ber­lin
  • 1999: Doc­tor­ate, Fac­ulty of Law, Hum­boldt-Uni­versity Ber­lin; Title of dis­ser­ta­tion: Ge­fahren­ab­wehr. Eine dogmatische Rekon­struk­tion
  • 1995 to 1999: Re­search as­so­ci­ate, Fac­ulty of Law, In­sti­tute for Pub­lic Law, Chair Prof. Dr. Bernhard Schlink, Humboldt-Uni­versity Ber­lin
  • 1995: Second state law ex­am
  • 1992 to 1995: Ju­dic­al clerk­ship, Su­per­i­or Court of Justice, Ber­lin
  • 1990 to 1992: Re­search as­sist­ant, In­sti­tute for Pub­lic Law, Uni­versity of Bonn, Chair Prof. Dr. Bernhard Schlink
  • 1990: First state law ex­am
  • 1984 to 1990: Study of Law, Uni­versity of Bonn; Uni­versité de Bour­gone, Di­jon; Lon­don School of Eco­nom­ics and Polit­ic­al Sci­ence


The project aims at a continuous doctrinal development of fundamental rights—with particular focus on funda­men­tal rights especially impacted by public se­cu­rity measures—in a transnational perspective. Fundamental rights are central for the legal evaluation of public security… more

This long-term project examines whether it is possible to develop a general doc­tri­nal scheme for public security measures comparable to the general doc­tri­nal schemes (Verbrechenssysteme) of substantive criminal law, how such a scheme would have to be conceptualized, and what… more

This long-term project, begun about a decade ago, aims to provide a philosoph­i­cally updated account of legal her­me­neu­tics. Whereas legal hermeneutics has often been associated with continental philosophical approaches (e.g., Gadamer, Ricœur), the project addresses the… more

German Constitutional Law from a Transnational Perspective more

State surveillance measures and their impact on constitutional freedoms have long been the subject of legal and political discourse. Building on prior, mainly theoretical, considerations about the need for realizing an “overall accounting” of surveillance, we began developing a… more

Die Polizei in der offenen Gesellschaft more

During the Covid-19 pandemic, numerous countries have experienced a scarcity of life-saving resources, including equipment (i.e., ventilators) and free space in intensive care units. Such situations raise difficult ethical and legal questions. Which criteria should be applied to… more


Book (25)

Kingreen, T., & Poscher, R. (2022). Grundrechte. Staatsrecht II (38. Aufl.). Heidelberg: C.F. Müller.
Kingreen, T., & Poscher, R. (2022). Polizei- und Ordnungsrecht: mit Versammlungsrecht (12. Aufl.) Grundrisse des Rechts. München: C.H. Beck.
Kingreen, T., & Poscher, R. (2021). Grundrechte. Staatsrecht II (37. Aufl.). Heidelberg: C.F. Müller.
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Collected Edition (10)

Dalla Barba, R. G. (Ed.). (2022). Princípios jurídicos: o debate metodológico entre Robert Alexy e Ralf Poscher. Belo Horizonte: Casa do Direito.
García Amado, J. A., & Dalla Barba, R. G. (Eds.). (2022). Principios jurídicos: el debate metodológico entre Robert Alexy y Ralf Poscher. Lima: Palestra Editores S.A.C.
Herdegen, M., Masing, J., Poscher, R., & Gärditz, K. F. (Eds.). (2021). Handbuch des Verfassungsrechts: Darstellung in transnationaler Perspektive. München: C.H. Beck.
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Journal Article (62)

Poscher, R. (2022). Proporcionalidade e a vinculação dos Direitos Fundamentais | Proportionality and the Bindingness of Fundamental Rights. Revista de Direitos Humanos e Desenvolvimento Social, 3, e227090. doi:10.24220/2675-9160v3e2022a7090
Kingreen, T., & Poscher, R. (2022). Die Ausgestaltung von Grundrechten. Juristenzeitung, 77(20), 961–970. doi:10.1628/jz-2022-0321
Poscher, R. (2022). Human Dignity in the Mechanics of Claims. Jus Cogens, 4(2), 193–201. doi:10.1007/s42439-021-00047-0
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Contribution to a Collected edition (80)

Poscher, R. (2023). The Hermeneutics of Legal Precedent. In T. Endicott, ‎H. D. Kristjánsson, & S. Lewis (Eds.), Philosophical Foundations of Precedent (pp. 143–157). Oxford: Oxford University Press. doi:10.1093/oso/9780192857248.003.0012
Poscher, R. (2023). § 129 Beurteilungsspielräume. In W. Kahl & M. Ludwigs (Eds.), Handbuch des Verwaltungsrechts - Band V: Maßstäbe und Handlungsformen im deutschen Verwaltungsrecht (Vol. V, pp. 265–313). Heidelberg: C.F. Müller.
Poscher, R., & Werner-Kappler, K. (2023). The Legal Framework of the COVID-19 Pandemic in Germany. In S. Braum (Ed.), Experimental Law: The Rule of Law and the Regulation of the Corona Pandemic in Europe (pp. 287–326) Luxemburger Juristische Studien – Luxembourg Legal Studies. Baden-Baden: Nomos. doi:10.5771/9783748938347-287
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Proceedings (1)

Poscher, R., Jestaedt, M., & Kammerhofer, J. (Eds.). (2020). Reine Rechtslehre auf dem Prüfstand / Hans Kelsen's Pure Theory of Law: Conceptions and Misconceptions. Tagung der Deutschen Sektion der Internationalen Vereinigung für Rechts- und Sozialphilosophie vom 27. - 29. September 2018 in Freiburg i. Brsg. Archiv für Rechts- und Sozialphilosophie - Beihefte (Vol. 163). Stuttgart: Franz Steiner.

Report (1)

Poscher, R., & Kilchling, M. (2021). Entwicklung eines periodischen Überwachungsbarometers für Deutschland: Pilotprojekt – Max-Planck-Institut zur Erforschung von Kriminalität, Sicherheit und Recht, Abteilung Öffentliches Recht, Freiburg i.Br. Potsdam-Babelsberg: Friedrich-Naumann-Stiftung für die Freiheit.

Series (1)

Hörnle, T., Van Gelder, J.-L., & Poscher, R. (Eds.). Social Science Research Network (SSRN) – Working Paper Series. Amsterdam: Elsevier.

Other (13)

Poscher, R., & Kilchling, M. (2022, April 29). Zwei Jahrzehnte nach 9/11 – Höchste Zeit für ein empirisch basiertes Monitoring staatlicher Überwachungsmaßnahmen. Berlin: Verfassungsblog. doi:10.17176/20220429-182152-0
Poscher, R., Kilchling, M., & Landerer, L. M. (2022). Entwicklung eines periodischen Überwachungsbarometers für Deutschland Jahrbuch 2021 der Max-Planck-Gesellschaft.
How Can We Effectively Assess the Level of Surveillance in a Society? (2021, August 25) Latest Thinking - Scientists Share Their Latest Thinking.
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