Bachelor, University California, Berkeley, 1949. Master of Arts, University California, Berkeley, 1951. Doctor of Philosophy, Cambridge University, 1956.
Instructor Oberlin College, 1957-1959. Assistant professor, associate professor Syracuse University, 1959-1965. Visiting associate professor University of California at Los Angeles, 1963-1964.
Associate professor, professor philosophy Claremont (California) Graduate School, since 1965, chairman department philosophy, 1966-1989.
Married Brenda Schweig. Children– Julia Elizabeth, Martin Edward, Sophia Katherine, Peter Charles, John Owen, Hugh William.