He was made an honorary doctor of the university in 2001.

He received an honorary doctor of laws degree from the same university in 1958.

The same year, he received an honorary doctor of letters degree from the university.

In 1920 the College awarded him an honorary doctor of laws degree.

In 1968, he was made an honorary doctor by Stockholm university.

He was awarded an honorary doctor of philosophy in international relations degree.

The college awarded him an honorary doctor of humanities degree in 1987.

In 1982 he was presented with an honorary doctor of humane letters degree.

Yale awarded him an honorary doctor of laws degree in 1924.

Yale awarded him an honorary Doctor of laws degree in 1903.