Ruth Barcan Marcus
American philosopher (1921-2012) · United States · On the map · Academics · Died at 90
Ruth Barcan Marcus was an American academic philosopher and logician best known for her work in modal and philosophical logic. She developed the first formal systems of quantified modal logic and in so doing introduced the schema or principle known as the Barcan formula.
Ruth Barcan Marcus is read about 19 times a day, in 19 languages.
A typical day, 30 days to 18 June 2026
The middle day of the days counted, so one week of news cannot move it. The line under it is the last 60 days, one point a day.
Something wrong?A life in dates
Also in Deutsch
Media & music
Photos 1
Awards
About this person
Marcus, who originally published as Ruth C. Barcan, was, as Don Garrett notes "one of the twentieth century's most important and influential philosopher-logicians". Timothy Williamson, in a 2008 celebration of Marcus' long career, states that many of her "main ideas are not just original, and clever, and beautiful, and fascinating, and influential, and way ahead of their time, but actually - I believe - true".
