Vattimo's philosophy can be characterized as postmodern with his emphasis on "pensiero debole" (weak thought). This requires that the foundational certainties of modernity with its emphasis on objective truth founded in a rational unitary subject be relinquished for a more multi-faceted conception closer to that of the arts. He draws on the philosophy of Martin Heidegger with his critique of foundations and the hermeneutic philosophy of his teacher Hans-Georg Gadamer. Perhaps his greatest influence though is the thought of Friedrich Nietzsche, whose "discovery of the 'lie', the discovery that alleged 'values' and metaphysical structures are just a play of forces" (1993:93), plays an important role in Vattimo's notion of "weak thought".
Vattimo rejected any notion of a transcendental structure of reasonorreality that would be given once and for all. This does not imply the loss of truth, but a Heideggerean reinterpretation of truth as the opening of horizons. Such truth is deeper than propositions which are made possible by such openings. Philosophies then are always responses to contingent questions, they are 'ontologiesofactuality,' a thesis that can be confirmed by the historico-cultural links of particular philosophies. For hermeneutics to be consistent with its own rejection of metaphysics, it must present itself, argues Vattimo "as the most persuasive philosophical interpretation of a situation or 'epoch'" (1997:10). To do this, Vattimo proposed a reading of hermeneutics as having a "nihilistic" vocation.[8]
To Vattimo, hermeneutics has become boring and vague, lacking any clear significance for philosophical problems. His answer was to insist on the nihilistic consequences of hermeneutics. The claim that "there are no facts only interpretations and this too is an interpretation" amounts to saying that hermeneutics cannot be seen as the most accurate/true description of the permanent structures of the reality of human existence. Hermeneutics is not a metaphysical theory in this sense and so can only be "proved" by being presented as the response to a history of being, a history of the fabling of the world, of the weakening of structures, that is as the occurrence of nihilism.
This nihilistic reading of history involves a certain attitude towards modernity, whereby modernity is dissolved from within through a twisting, distorting radicalisation of its premises. Vattimo uses Heidegger's term Verwindung to capture this post-modern recovery from modernity.
History as a process of weakening (secularisation and disenchantment are other terms Vattimo uses) "assumes the form of a decision for non-violence" (1992:95). An ethics of communication along the lines suggested by Jürgen Habermas suffers, according to Vattimo, from finding itself in a substantially ahistorical position, while oscillating between formalism and cultural relativism (1992:117). For Vattimo it is only when hermeneutics accepts its nihilistic destiny that "it can find in 'negativity,' in dissolution as the 'destiny of Being' ... the orientating principle that enables it to realize its own original inclination for ethics whilst neither restoring metaphysics nor surrendering to the futility of a relativistic philosophy of culture" (1992:119).
In 2004, after leaving the party of the Democrats of the Left, he endorsed Marxism, reassessing positively its projection principles and wishing for a "return" to the thought of the Trier philosopher and to a communism, rid of distorted Soviet developments, which have to be dialectically overcome. Vattimo asserted the continuity of his new choices with the "weak thought," thus having changed "many of his ideas." He namely referred to a "weakened Marx,"[9] as an ideological basis capable of showing the real nature of communism. The new Marxist approach, therefore, emerged as a practical development of the "weak thought" into the frame of a political perspective. His next political book, co-authored with Santiago Zabala, is Hermeneutic Communism: From Heidegger to Marx (2011).
The authors explain the book Hermeneutic Communism as follows: "Although the material published here had never been released before, there are two books that have determined the production of this text: Gianni's Ecce Comu: Come si diventa cio che si era (2007) and Santiago's The Remains of Being: Hermeneutic Ontology After Metaphysics (2009). In the former, Vattimo emphasized the political necessity of reevaluating communism; in the latter, Zabala insisted on the progressive nature of hermeneutics. Hermeneutic Communism can be considered a radical development of both."[10]
Vattimo added his name to a petition released on 28 February 2009, calling on the European Union to remove Hamas from its list of terrorist organizations and grant it full recognition as a legitimate voice of the Palestinian people.
On 22 July 2014, in response to the IDFmilitary operation on Gaza, Vattimo said he would personally like to "shoot those bastard Zionists" and thinks Europeans should raise money "to buy Hamas some more rockets".[2] He expressed his willingness to go to Gaza and fight side by side with Hamas and asserted, when asked if he would shoot at Israelis, that: 'By nature I'm non-violent, but I'd shoot at those (of them) who bomb hospitals, private clinics and children.' Vattimo added that for him these were 'pure Nazis', the state itself a Nazi state (uno stato nazista) perhaps somewhat worse even than Hitler because, in Israel's case, they have the support of the great Western democracies.[11]
Vattimo had been accused of anti-Semitism due to his anti-Zionism. Renzo Gattegna, the president of the Union of Italian Jewish Communities, accused him of anti-Semitism, writing "words of hatred that don't add anything new and are accompanied by the squalid reproposal of anti-Semitic stereotypes".[12][13] Rabbi Barbara Aiello, Italy's first female rabbi, also accused Vattimo of anti-Semitism. Reacting to his "Zionist bastards" statements and to others like it, the foreign ministers for Italy, France and Germany said that they condemn such language as well as violence that has occurred at pro-Palestinian demonstrations in Europe.[14] Pronounced in a moment of indignation against the prolonged bombing of Gaza by the Israeli army, Vattimo apologized to an Israeli newspaper (Haaretz). "In a telephone interview [...], Gianni Vattimo said he “regrets” such words and “feels ashamed” by them",[15] claiming he was "provoked" by the hosts of the show on which he made his comments.[16]
(1991) The End of Modernity: Nihilism and Hermeneutics in Post-modern Culture, translated by John R. Snyder, Polity Press, 1991. Translation of La fine della modernità, Garzanti, Milan, 1985
(1992) The Transparent Society, translated by David Webb, Johns Hopkins University Press, 1994. Translation of La società trasparente, Garzanti, Milan, 1989
(1993) The Adventure of Difference: Philosophy after Nietzsche and Heidegger, translated by Thomas Harrison and Cyprian P. Blamires, Johns Hopkins University Press, 1993. Translation of Le avventure della differenza, Garzanti, Milan, 1980
(1997) Beyond Interpretation: The Meaning of Hermeneutics for Philosophy, translated by David Webb, Stanford University Press, 1997. Translation of Oltre l'interpretazione, Laterza, Rome-Bari, 1994
(1998) Religion by Jacques Derrida, edited by Gianni Vattimo, translated by David Webb, Stanford University Press, 1998
(1999) Belief by Gianni Vattimo, et al., Polity Press, 1999. Translation of Credere di credere, Garzanti, Milan, 1996
(2002a) Nietzsche: Philosophy as Cultural Criticism, translated by Nicholas Martin Stanford University Press, 2002. Translation of Introduzione a Nietzsche, Laterza, Rome-Bari,1985
(2002b) After Christianity, New York: Columbia University Press, 2002.
(2004) Nihilism and Emancipation: Ethics, Politics and Law, edited by Santiago Zabala, Columbia University Press, 2004
(2005) The Future of Religion, Richard Rorty and Gianni Vattimo, edited by Santiago Zabala, Columbia University Press, 2005
(2006) After the Death of God, John D. Caputo and Gianni Vattimo, edited by Jeffrey W. Robbins, Columbia University Press.
(2008) Dialogue with Nietzsche, Gianni Vattimo, Columbia University Press.
(2008) Art's Claim to Truth, Gianni Vattimo, edited by Santiago Zabala, Columbia University Press.
(2009) Christianity, Truth, and Weak Faith, Gianni Vattimo and René Girard, edited by P. Antonello, Columbia University Press.
(2010) The Responsibility of the Philosopher, Gianni Vattimo, edited by Franca D'Agostini, Columbia University Press.
(2011) Hermeneutic Communism, Gianni Vattimo and Santiago Zabala, Columbia University Press.
(2012) Weak Thought, translated by Peter Carravetta, SUNY series in Contemporary Italian Philosophy, 2012. Translation of Il pensiero debole, Feltrinelli, Milano, 1983
(2014) Deconstructing Zionism: A Critique of Political Metaphysics, edited by Gianni Vattimo and Michael Marder, Bloomsbury.
Weakening Philosophy. Essays in Honour of Gianni Vattimo, Edited by Santiago Zabala (with contributions from U. Eco, C. Taylor, R. Rorty, J-L. Nancy, F. Savater and many others), Montreal: McGill-Queen's University Press, 2007.
Enrico Redaelli, Il nodo dei nodi. L'esercizio del pensiero in Vattimo, Vitiello, Sini, Ets, Pisa 2008.
Wolfgang Sützl, Emancipación o Violencia. Pacifismo estético en Gianni Vattimo. Barcelona: Icaria 2007.
Ashley Woodward, Review of Weakening Philosophy. Essays in Honour of Gianni Vattimo, Edited by Santiago Zabala", in "Colloquy" Issue 15 June 2008.
Between Nihilism and Politics. The Hermeneutics of Gianni Vattimo. Edited by Silvia Benso and Brian Schroeder. New York: Suny 2010. ISBN978-1-4384-3285-4
Matthew Edward Harris, Essays on Gianni Vattimo: Religion, Ethics and the History of Ideas. Newcastle-Upon-Tyne: Cambridge Scholars Publishing, 2016.
Tommaso Franci, Vattimo o del nichilismo, Roma, Armando, 2011.
Ricardo Milla, Vattimo y la hermenéutica política, en Isegoria (Madrid), 2011, julio, No 44, pp. 339–343
Lozano Pino, Jesús, "El amor es el límite. Reflexiones sobre el cristianismo hermenéutico de G. Vattimo y sus consecuencias teológico-políticas", Madrid, Dykinson, 2015. ISBN978-84-9085-269-9 ISBN electrónico: 978-84-9085-282-8
Brais González Arribas, Reduciendo la violencia. La hermenéutica nihilista de Gianni Vattimo. Madrid, Dykinson, 2016.
Emilio Carlo Corriero, "Nietzsche's Death of God and Italian Philosophy". Preface by Gianni Vattimo, Rowman & Littlefield, London - New York, 2016
Lozano Pino, Jesús, "El último Vattimo: Lección inaugural curso 2019-2020 de los Centros Teológicos de Málaga, Diócesis de Málaga, D.L. 2019. Depósito Legal:MA 1158-2019, ISBN978-84-0914742-7.
