What standards are upheld by the scientific community affect the community internally, and also affect its relations with society at large, including Congress.

Most are at the graduate level. Books
He was a prolific writer of mathematical texts often completing one on his summer vacation.  285–325).

He held faculty positions at the University of Chicago and Columbia University (from 1955 leaving in 1971 in a dispute). At the time of his death he was professor emeritus of mathematics at Yale University.