Saunders MacLane was an extraordinary mathematician, a dedicated teacher, and a good citizen who cared deeply about the values of science and ecucation. His lif... » 

Saunders MacLane was an extraordinary mathematician, a dedicated teacher, and a good citizen who cared deeply about the values of science and ecucation. His life covers nearly a century of mathematical developments. He participated in the exciting happenings in Göttingen, he studied under David Hilbert, Hermann Weyl, and Paul Bernays, and witnesses the collapse of a great tradition.Perhaps the most outstanding accomplishment was the development of the concept of categories, together with Samuel Eilnberg. «