The philosophy magazine Philosophy Now was founded in 1991. According to the Philosophy Documentation Center it "has become the most widely read philosophy publication in the English-speaking world".
Monographies and essays
Daniel Dennett, Consciousness Explained (1991)
Bruno Latour, We Have Never Been Modern (1991)
Robert B. Pippin, Modernism as a Philosophical Problem: On the Dissatisfactions of European High Culture (1991)
Manuel de Landa, War in the Age of Intelligent Machines (1991)
David Gelernter, Mirror Worlds (1991)
Jürgen Habermas, Justification and Application: Remarks on Discourse Ethics (1991, English translation: 1993)
Thomas Nagel, Equality and Partiality (1991)
David Lewis, Parts of Classes (1991)
Robert M. Pirsig, Lila: An Inquiry into Morals (1991)
Jostein Gaarder, Sophie's World (1991)
Northrop Frye (January 23)
Wolfgang Stegmüller (June 11)
Henri Lefebvre (June 29)
Henri de Lubac (September 4)
Vilém Flusser (November 27)
1991 in philosophy Wikipedia (Text) CC BY-SA