Currently alive, at 89 years of age.
1932 – Born on the 29th of May.
1953 – He earned his Bachelor of Arts in zoology at the University of Pennsylvania, Pennsylvania,U.S.A.
1954 – He married to Anne Fitzhugh Howland.
1955 – He earned his Master of Arts in University of Kansas, Lawrence, Kansas, U.S.A.
1957 – He received his Doctor of Philosophy in University of Kansas.
1959 – He joined the faculty at Stanford.
1966 – He promoted as a full professor of biology.
1967 – He wrote an article that appeared in "New Scientist" a science magazine.
1968 – He was one of the founders of the group Zero Population Growth.
1977 – He was named to the Bing Professorship at Stanford University.
2001 – He Distinguished Scientist Award of the American Institute of Biological Sciences.