MOVING TO FRONT FROM NOVEMBER 12--UPDATED
Via his former student Claire Finkelstein on Twitter, I learned that Professor Gauthier died on November 9. He was emeritus at the University of Pittsburgh, whose department he joined in 1980 after more than twenty years at the University of Toronto. He was well-known for his contributions to political and moral philosophy, and its history (especially Hobbes and Rousseau). You can learn a bit more about his work here. Comments are open for remembrances from those who knew Professor Gauthier, or for those who wish to comment on the significance of his work. Please feel free to submit links in the comments to obituaries and memorial notices as well.
UPDATE: A memorial notice from the University of Toronto, and another from the University of Pittsburgh.
