Lüthi's work focused on political philosophy, feminist theology and the relation between theology and psychoanalysis. In 1965, together with well respected theologians Wilhelm Dantine, Ferdinand Klostermann and Otto Mauer, he instigated the foundation of Austrias first Ecumenical Study Group. From 1967 to 1988 he was engaged in Christian–Jewish reconciliation work and served as member of the board in the Commission for Christian-Jewish cooperation. In 1970 he was appointed as honorary member of the foundation Pro Oriente. Lüthi also furthered the dialogue between Christianity and Marxism, as well as talks between the arts and theology.
Selected publications
Judas Iskarioth in der Geschichte der Auslegung von der Reformation bis zur Gegenwart. Zürich 1955. [Judas Iscariot in the History of Interpretation from the Reformation Age to the Present]
Gott und das Böse. Eine biblisch-theologische und systematische These zur Lehre vom Bösen, entworfen in Auseinandersetzung mit Schelling und Karl Barth. Zürich 1961. [God and the Evil]
(with Kurt Marti and Kurt von Fischer): Moderne Literatur, Malerei und Musik : 3 Entwürfe zu einer Begegnung zwischen Glaube und Kunst. Zürich 1963. [Modern Literature, Painting and Music: Encounters between the Faith and the Arts]
Die neue Welt der Schriftsteller. Theologische Argumente für die Literatur der Gegenwart. Stuttgart 1968. [The New World of Writers. Theological Arguments for the Contemporary Literature]
Theologie als Dialog mit der Welt von heute. Freiburg im Breisgau 1971. [Theology as Dialogue with the World of Today]
Gottes neue Eva. Transformations of the Feminine. Stuttgart 1978.[Gods new Eve]
Feminismus und Romantik. Sprache, Gesellschaft, Symbole, Religion. Vienna - Cologne - Graz 1985. [Feminism and Romanticism. Language, Society, Symbols, Religion]
(ed. with Koloman N. Micskey): Theologie im Dialog mit Freud und seiner Wirkungsgeschichte. Wien 1991. [Theology in Dialogue with Freud and his Impact]
Mut zum fraglichen Sein. Wege eines Theologen zu zeitgenössischer Kunst und Literatur. Wien 1996. [Courage to a Questionable Existence. Way of a Theologian to Contemporary Art and Literature]
Thomas Krobath, Dieter Olaf Schmalstieg, Max J. Suda (ed.): Befreiung in Zwängen : für Kurt Lüthi. Vienna: Verlag für Gesellschaftskritik 1986. [Liberation in constraints - for Kurt Lüthi]