Gadamer worked on the book for decades. He had been publishing philological and philosophical essays since the 1930s, but Truth and Method represents the crystallization of his mature thought.
The book engages with an enormous range of interlocutors: Plato and Aristotle, the humanist tradition of the Renaissance, Vico, Kant, Schleiermacher, Dilthey, Heidegger, and the neo-Kantianism of Gadamer's teachers. The philosophical architecture is dense, but the underlying argument is consistent: understanding is dialogical, historical, linguistic, and never finished.
Key concepts introduced or developed in the book: the fusion of horizons, the rehabilitation of prejudice, the hermeneutic circle, the primacy of the genuine question, the authority of tradition, play as the ontology of the artwork, and the claim that 'being that can be understood is language.'
The book has spawned an enormous secondary literature and several major philosophical debates, most notably the Habermas-Gadamer exchange of the 1960s and 70s about the role of tradition versus critical reason in social understanding.
Wahrheit und Methode was published in German in 1960 by J.C.B. Mohr (Paul Siebeck) in Tübingen.
The first English translation, by Garrett Barden and John Cumming, appeared in 1975. A revised translation by Joel Weinsheimer and Donald G. Marshall appeared in 1989 and is now the standard.
Truth versus method. The natural-scientific ideal of method cannot be extended to human sciences without distorting what understanding there is.
Art as truth-disclosure. The experience of art is not merely aesthetic but discloses truth in ways propositional knowledge cannot capture.
The hermeneutic circle. Understanding is structurally circular — parts through whole, whole through parts — and the circle is productive rather than vicious.
The rehabilitation of prejudice. Pre-judgments are not obstacles to understanding but its enabling conditions, when submitted to the discipline of testing.
Language as medium. Language is not a tool consciousness uses but the element in which understanding lives. 'Being that can be understood is language.'
The book sparked the Habermas-Gadamer debate about critical reason and tradition, the Derrida-Gadamer non-encounter about the possibility of dialogue, and ongoing controversies about relativism, objectivity, and the universality of the hermeneutic problem. Each controversy has shaped the book's reception. In the AI age, new debates focus on whether the book's framework can be extended to non-human participants in the hermeneutic conversation.