Theodor W. Adorno in the context of "Second Viennese School"

German philosophy, meaning philosophy in the German language or philosophy by German people, in its diversity, is fundamental for both the analytic and continental traditions. It covers figures such as Gottfried Wilhelm Leibniz, Immanuel Kant, Georg Wilhelm Friedrich Hegel, Karl Marx, Friedrich Nietzsche, Martin Heidegger, Ludwig Wittgenstein, the Vienna Circle, and the Frankfurt School, who now count among the most famous and studied philosophers of all time. They are central to major philosophical movements such as rationalism, German idealism, Romanticism, dialectical materialism, existentialism, phenomenology, hermeneutics, logical positivism, and critical theory. The Danish philosopher Søren Kierkegaard is often also included in surveys of German philosophy due to his extensive engagement with German thinkers.

The Frankfurt School is a school of thought in sociology and critical theory. It is associated with the Institute for Social Research founded in 1923 at the University of Frankfurt am Main (today known as Goethe University Frankfurt). Formed during the Weimar Republic during the European interwar period, the first generation of the Frankfurt School was composed of intellectuals, academics, and political dissidents dissatisfied with the socio-economic systems of the 1930s: namely, capitalism, fascism, and communism. Significant figures associated with the school include Max Horkheimer, Theodor Adorno, Walter Benjamin, Erich Fromm, Wilhelm Reich, Herbert Marcuse, and Jürgen Habermas.

The Frankfurt theorists proposed that existing social theory was unable to explain the turbulent political factionalism and reactionary politics, such as Nazism, of 20th-century liberal capitalist societies. Also critical of Marxism–Leninism as a philosophically inflexible system of social organization, the School's critical-theory research sought alternative paths to social development.

Ernst Simon Bloch (/blɒk/; German: [ɛʁnst ˈblɔx]; July 8, 1885 – August 4, 1977; pseudonyms: Karl Jahraus, Jakob Knerz) was a German Marxist philosopher. Bloch was influenced by Georg Wilhelm Friedrich Hegel and Karl Marx, as well as by apocalyptic and religious thinkers such as Thomas Müntzer, Paracelsus, and Jacob Böhme. He established friendships with György Lukács, Bertolt Brecht, Kurt Weill, Walter Benjamin, and Theodor W. Adorno. Bloch's work focuses on an optimistic teleology of the history of mankind.

Dialectic of Enlightenment (German: Dialektik der Aufklärung) is a work of philosophy and social criticism written by Frankfurt School philosophers Max Horkheimer and Theodor W. Adorno. The text, published in 1947, is a revised version of what the authors originally had circulated among friends and colleagues in 1944 under the title of Philosophical Fragments (German: Philosophische Fragmente).

One of the core texts of critical theory, Dialectic of Enlightenment explores the socio-psychological status quo that had been responsible for what the Frankfurt School considered the failure of the Enlightenment. They argue that its failure culminated in the rise of Fascism, Stalinism, the culture industry and mass consumer capitalism. Rather than liberating humanity as the Enlightenment had promised, they argue it had resulted in the opposite: in totalitarianism, and new forms of barbarism and social domination.

Minima Moralia: Reflections from Damaged Life (German: Minima Moralia: Reflexionen aus dem beschädigten Leben) is a 1951 critical theory book by German philosopher Theodor W. Adorno. Adorno started writing it during World War II, in 1944, while he lived as an exile in America, and completed it in 1949. It was originally written for the fiftieth birthday of his friend and collaborator Max Horkheimer, who had co-authored the earlier book Dialectic of Enlightenment with Adorno.

The book consists of 153 aphorisms and short essays that reflect on the nature of modern life and the impact of capitalism, fascism, and mass culture on the individual. Adorno critiques the alienation, conformity, and loss of individuality in modern society, arguing that the conditions of late capitalism have made it impossible to lead a genuine, fulfilling life.

Negative Dialectics (German: Negative Dialektik) is a 1966 book by the philosopher Theodor W. Adorno, in which he presents a critique of traditional Western philosophy and dialectical thinking. Adorno argues that the Enlightenment's emphasis on reason and progress has led to the domination of nature and the suppression of human individuality, and he develops the notion of negative dialectics as a critique of the positive, idealistic dialectics of Hegel and the Marxist dialectical materialism that grew out of it.

Negative dialectics rejects the idea of a final synthesis or reconciliation, instead emphasizing the importance of maintaining the tension between contradictory elements and resisting the temptation to subsume particulars under abstract, totalizing concepts.

Surrealist music is music which uses unexpected juxtapositions and other surrealist techniques. Discussing Theodor W. Adorno, Max Paddison defines surrealist music as that which "juxtaposes its historically devalued fragments in a montage-like manner which enables them to yield up new meanings within a new aesthetic unity", though Lloyd Whitesell says this is Paddison's gloss of the term. Anne LeBaron cites automatism, including improvisation, and collage as the primary techniques of musical surrealism. According to Whitesell, Paddison quotes Adorno's 1930 essay "Reaktion und Fortschritt" as saying "Insofar as surrealist composing makes use of devalued means, it uses these as devalued means, and wins its form from the 'scandal' produced when the dead suddenly spring up among the living."