Editors’ Note: The renowned ecologist G. Evelyn Hutchinson was the first scholar to pen “Marginalia” in American Scientist, beginning in 1942. This entry is from his last year as Marginalist, 1954. The controversy he describes has only been resolved within the past decade, and we are not about to spoil the punch line here. If, however, you visit the American Scientist website—after reading the Yale professor’s analysis, please—you can find a selection of links to material about the inevitable reach of genetic analysis to solve the dilemma.