skip to primary navigationskip to content

Ryan Haecker


I have been awarded the Peterhouse Graduate Research Studentship to study for a Doctor of Philosophy in Theology and Religious Studies under the supervision of Professor Lord Rowan Williams of Oystermouth.  My doctoral dissertation, tentatively titled 'Restoring Reason: Origen's Trinitarian Logic', should show, through a deep and creative reading of Origen, how logic is ontological, ontology is theological, and theology is trinitarian.

I have previously studied history, philosophy, and theology at the University of Texas, the University Würzburg, and the University of Nottingham.  I have written a genealogy of the analogy of being and dialectical logic from Plato and Aristotle, through Aquinas and Ockham, to Hegel and Przywara.  I wish to write a future monograph, tentatively titled 'Analogy and Dialectic: A Genealogy of the Trinity', to explore the philosophical, systematic, and historical intersections of analogy and dialectic in trinitarian theology.  My research examines the intersections of ancient Platonism, medieval Scholasticism, and modern Idealism for modern theology.

I am currently working on an interdisciplinary research project, between historical and systematic theology, focusing on the reception of Stoic logic and Platonic ontology in the early Patristic trinitarian theology of Origen of Alexandria.  I wish to argue that Origen's trinitarian theology contains a trinitarian logic.  I hope to help inaugurate a new field of research in the theology of logic for the development of a future trinitarian ontology.

Area of Interest

  • Trinitarian Theology
  • Philosophy of Logic
  • Patristics
  • Platonism
  • German Idealism
  • Systematic Theology


  • Peterhouse Symposium Lent 2017 – Origen’s Angel of History
  • Cambridge Eriugena Reading Group – The Five Modes of Negation in the Periphyseon
  • Cambridge Hegel Reading Group – Introduction to the Concept the Science of Logic
  • Cambridge Hegel Reading Group – Dialectic in the Phenomenology of Spirit
  • Young Austin Professional Philosophy Association – The Political Theology of Climate Change
  • Silence(s) Study Day – The One that is Not: The Logic of Silence in Plato’s Parmenides
  • Cambridge Centre for the Study of Platonism – On Origen's Speculative Angelology
  • Peterhouse Symposium Michelmas 2017 – Origen’s Trinitarian Logic 
  • Young Austin Professional Philosophy Association – The Political Theology of Climate Change
  • Silence(s) Study Day, University of Cambridge Faculty of Divinity - The One that is Not: The Logic of Silence in Plato’s Parmenides
  • Cambridge Centre for the Study of Platonism, University of Cambridge Faculty of Divinity - On Origen's Speculative Angelology
  • Jefferson Book Club – Summer Reading Group on Ancient Political Philosophy, University of Texas
  • Durham University Centre for Catholic Studies – A Short Theological History of Infinity 
  • Postgraduate Presentation – Is Thomism Radical Enough? A Reply to Alan Darley
  • Undergraduate Philosophy Association – Plato, Logic, and Ontology
  • Theravada Buddhism and Catholic Christianity – Public Discussion
  • Texas Health and Science University Lecture - The Roots of Chinese Medicine
  • Texas Health and Science University Lecture Series - Oriental History in Three Acts
  • Houston Baptist University Philosophy Conference - The Historicism and Providence of Middle-Earth
  • UT Anscombe Society - Philosophy of Nature and Natural Law
  • Jefferson Book Club - Edward Gibbons and the History of the Decline and Fall of the Roman Empire
  • Phi Alpha Theta National History Honors Society - Schumpeter Imperialism 
  • Undergraduate Philosophy Association - Just War Theory
  • Undergraduate History Society - The Philosophy of History of Hegel

Research Interests

Trinitarian Theology, Philosophical Theology, Systematic Theology, Patristics, Pythagoreanism, Platonism, Aristotelianism, Origen, Augustine, Dionysius, Medieval Scholasticism, Thomas Aquinas, Duns Scotus, William Ockham, Nicholas Cusa, German Idealism, Kantianism, Hegelianism, Schelling, Heidegger, Intellectual History of Europe and the History of Western Philosophy, the History and Philosophy of Western Antiquity and East Asia, World History, the Philosophy of History and Historiography, Political Theology and Political Philosophy, the Philosophy and History of Logic, the Philosophy of Mathematics, Metaphysics and Ontology, Virtue Ethics, Aesthetics, Phenomenology, Angelology, Analogy, Participation, Paradox, Contradiction, Dialetheism, and Dialectic. 

Other Professional Activities

I host the Dionysius of Areopagite Reading Group for the study of ecclesio-politics.


Key Publications

  • Review of Roger Scruton, On Human Nature [Politics & Poetics: A Journal for Humane Philosophy] (Forthcoming)
  • Review of Geoffrey Holsclaw, Transcending Subjects: Augustine, Hegel, and Theology [Hegel Bulletin of the Hegel Society of Great Britain. Cambridge University Press, 2017]
  • Is Thomism Radical Enough? A Reply to Alan Darley [Theofilos vol. 8 no. 1 (2016): 16-28.]


Other Publications

  • Plato's Positive Dialectic: Hegel Reads Plato's Parmenides, Sophist, and Philebus
  • A Case for Contradictions in the Trinity: A Neoplatonic Metaphysics of Relative Identity
  • The Gothic Analogy of Being: An Investigation of the Sublime and the Infinite
  • Plato Against Phenomenology: A Genealogical Critique
  • Dialectical Analogy and Analogical Dialectics: Przywara and Hegel on the Analogy of Being
  • In Defense of Plato on Mathematical Ideas: A Commentary on Aristotle’s Metaphysics XIII 6-8
  • Plato’s Contest: Answering the Challenge of the Parmenides


Current students and supervisors can access the Faculty’s Moodle page by clicking on the image below.