"Lo que hace falta cambiar de nuestro pensamiento sobre el cambio climático (y sobre el propio pensamiento)." Agencia humana, responsabilidad y control en el Antropoceno, University of the Basque Country, San Sebastian, Spain, November 20, 2017.
"Vertimus: Ten Points on Becoming-Plant". Devenir Plante, École Polytechnique, Université Paris-Saclay, Paris, France, October 12, 2017.
(with Luis Garagalza), "Lo humano entre lo vegetal y lo animal". Physis kai Polis: XII International Congress of Ontology. Donostia-San Sebastian, Spain, October 4, 2016.
"O mundo em fogo." A Guerra dos Mundos? 30th Annual Congress of the Teachers of Philosophy. Conímbriga, Portugal, February 13, 2016.
"Architectural Amekhania: Dwelling on the Hither Side of Economy." Ecologies, Aesthetics, and Histories of Art I. Max Planck Institut, Kunsthistorisches Institut in Florenz, Florence, December 14, 2015.
"La montaña energética." VI Jornadas de Literatura, Cine y Montaña. The University of the Basque Country, Vitoria-Gasteiz, November 17, 2015.
"Encountering Another Human in the Woods." 29th Annual Conference of the Society for Literature, Science, and the Arts. Rice University, Houston, TX, November 14, 2015.
"Beyond an Extractive-Destructive Energy Paradigm." Knowledge & Technology: Production, Transfers, Circulations. State University of St. Petersburg, St. Petersburg, Russia, November 13, 2015.
"The Energy of the End." The End of the World. Insitut Finlandais, Paris, France, September 25, 2015.
"Meat without Flesh." Seizing an Alternative: Toward an Ecological Civilization. Pomona College, CA, June 6, 2015.
"Ecology as Event." Eco-Deconstruction: Derrida and Environmental Ethics. Department of Philosophy, Vanderbilt University, Nashville, TN, March 21, 2015.
"Where Does Pessoa Dwell? The Economy and Ecology of the Heteronyms". Fernando Pessoa: Between Literature and Philosophy. Georgetown University, Washington, DC, March 3, 2015.
(with Patricia Vieira), "The Language of Plants: A Philosophical Perspective". A Linguagem das plantas: Entre a literatura e a filosofia. National Museum of Natural History and Science, Lisbon, Portugal, November 30, 2014.
(with Luce Irigaray), "Sharing without Dividing". Sharing the World. University of Bristol, Bristol, UK, October 30, 2014.
"To Hear Plants Speak". Plant Intelligence: Philosophical and Scientific Perspectives. Georgetown University, Washington, DC, October 1, 2014.
"The Other 'Jewish Question'". Heidegger's Black Notebooks: Philosophy, Politics, Anti-Semitism. Emory University, Atlanta, GA, September 5, 2014.
"Lo vertical y lo vertiginoso: Hacia una fenomenología de la montaña." IV Jornadas de Literatura, Cine y Montaña. The University of the Basque Country, Vitoria-Gasteiz, November 6, 2013.
"The Proximity of the Forest". The Philosophical Legacy of Vladimir Bibikhin. St. Petersburg State University, St. Petersburg, Russia, May 16, 2013.
“Hacia una filosofía de las plantas”. Bio-Filosofía: Pensar la Biología, Pensar desde Biología. The University of Deusto, Bilbao, February 21, 2013.
“The Aristocracies of Space”. First Mendi Symposium “La Montaña en las Humanidades y las Ciencias Sociales”. The University of the Basque Country, Vitoria, November 7-9, 2012.
"Carl Schmitt and the De-Constitution of Europe". First International Congress of the International Network of Schmitt Studies. Federal University of Uberlândia, Brazil, October 29-November 1, 2012.
"Sujeto, Redes, Jerarquías". Poder, Fisco y Mercado: La Ciudad y sus Redes en la Baja Edad Media. The University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, March 22-3, 2012.
"Critical Phenomenology". First Lisbon International Conference of Philosophy: Thinking the Twentieth Century: Philosophy and Its Conditions. University of Lisbon, Portugal, October 27-29, 2011.
"Phenomena: A Critique of Logos". Fourth International Congress of the Portuguese Association for Phenomenological Philosophy: Science and Phenomenology. University of Evora, Portugal, October 10-14, 2011.
"El Humor y la Crisis". III Jornadas de Humor. The University of the Basque Country, UPV/EHU, Vitoria-Gasteiz, October 6-7, 2011. (video)
"The Ethical Ungrounding of Phenomenology". IV Organization of Phenomenological Organizations (OPO) World Conference. Segovia, Spain, September 19-23, 2011.
"The Two Phenomenologies: Of Consciousness and of Spirit". Questioning Grounds: Contemporary Readings of German Idealism, a conference of the Nordic Network of German Idealism. Södertörn University, Sweden, June 3-4, 2011.
“Vegetative Democracy, or the Post-Metaphysics of Plants”. Politics of the One: The Limits of Fragmentation and the Promise of Consolidation. International Conference, European University of St. Petersburg, Russia, April 8-10, 2010.
“The Temporality of Distraction, or the Creation of Subjectivity in Philosophical Confessions”. Forty-Eighth Annual Meeting of the Society for Phenomenology and Existential Philosophy (SPEP). Alexandria, VA, October 29-31, 2009.
“Politics in Question: On Carl Schmitt’s Politikfrage”. Thirty-Third Annual Conference of the German Studies Association. Arlington, VA, October 8-11, 2009.
“In the Name of the Law: Carl Schmitt and the Metonymic Abuses of Legality”. Telos Institute Conference. New York University, NY, January 17, 2009.