After earning BA from Yale University and an MA from the University of Chicago, I got my Ph.D. from the University of Göttingen, studying logic and mathematics under Paul Bernays, Emmy Noether and Hermann Weyl.
Most of my career was spent as a Mathematics Professor at the University of Chicago, where I focused on abstract algebra topics and with a colleague, created the filed of category theory.
Due to my style of writing and explaining mathematics using arrows, I am often called the father of "the diagrammatic approach to contemporary mathematics."
Devoted to writing user-approachable texts, I co-authored the seminal modern algebra text that basically allowed undergraduates to learn and master this field.
As President of the Mathematical Association of America in the 1950s, I started its activities aimed at improving the teaching of modern mathematics...aka Sputnik or modern math.
As a side note, I inserted an unexpected space into my surname because my first wife had difficulty typing the name without a space.
Saunders Mac Lane (1909 – 2005)