1933
Born to Talcott Parsons and Helen B. Walker Parsons in Cambridge, MA.
1954
Earns a Bachelor of Arts from Harvard University; Conducts postgraduate coursework at Cambridge University until 1955.
1956
Achieves a Master of Arts from Harvard University.
1958
Is a junior fellow at Harvard University through 1961.
1961
Obtains a Doctor of Philosophy from Harvard University; Is an assistant professor of philosophy at Cornell University until 1962.
1962
Is an assistant professor of philosophy and a George Santayana Fellow in Philosophy at Harvard University until 1965.
1965
Teaches as an associate and full professor of philosophy at Columbia University until 1989.
1968
Marries Marjorie Louise Wood.
1971
Serves the Association for Symbolic Logic as secretary until 1976, vice president from 1986 to 1989 and president from 1989 to 1992.
1976
Is department chairman at Columbia University until 1979 and again from 1985 to 1989.
1979
Is a National Endowment of the Humanities Fellow through 1980 and an All Souls College Visiting Fellow in Oxford, England through 1980.
1983
Publishes “Mathematics in Philosophy: Selected Essays” through the Cornell University Press.
1987
Is a Guggenheim Fellow and a Netherlands Institute for Advanced Study Fellow.
1989
Returns to Harvard University as a professor and Edgar Pierce Professor of Philosophy until attaining emeritus status in 2005.
1994
Is a fellow of the Center for Advanced Study in the Behavioral Sciences through 1995.
2008
Publishes “Mathematical Thought and its Objects” through the Cambridge University Press.
2018
Speaks at a summer conference in Austria.
2021
Continues to contribute as a fellow of the American Academy of Arts and Sciences.
2021
Maintains membership with the Norwegian Academy of Science and Letters and the American Philosophical Association.