Theodore de Laguna

Theodore de Leo de Laguna (July 22, 1876 – September 22, 1930) was an American philosopher who taught for years at Bryn Mawr College and was known as an early feminist.

Biography Theodore de Leo de Laguna was born on 22 July 1876 in Oakland, California. His mother died young, and he was raised by his older sister Frederica.

He received a B.A. from the University of California, Berkeley, in 1896, an M.A. in 1899, and a Ph.D. in philosophy from Cornell University in 1901.

In 1907 Theodore began teaching philosophy at Bryn Mawr College. His wife would also join the department in 1912.

He died on 22 September 1930.

Works Books (with Grace de Laguna) Dogmatism and Evolution:Studies in Modern Philosophy (1910) Introduction to the Science of Ethics (1914) The Factors of Social Evolution (1926)

Select journal papers (1915) ’The Postulates of Deductive Logic’, The Journal of Philosophy, 12(9), pp. 225–236. (2019) ‘A Nominalistic Interpretation of Truth’ (edited by J. Katzav) British Journal for the History of Philosophy 27:5, pp. 1034–1040