James McKeen Cattell, American psychologist and academic (d. 1944)
James McKeen Cattell (May 25, 1860 – January 20, 1944), American psychologist, was the first professor of psychology in the United States, teaching at the University of Pennsylvania, and long-time editor and publisher of scientific journals and publications, most notably the journal Science. He also served on the board of trustees for Science Service, now known as Society for Science & the Public (or SSP), from 1921 to 1944.

At the beginning of Cattell's career, many scientists regarded psychology as, at best, a minor field of study, or at worst a pseudoscience such as phrenology. Perhaps more than any of his contemporaries, Cattell helped establish psychology as a legitimate science, worthy of study at the highest levels of the academy. At the time of his death, The New York Times hailed him as "the dean of American science." Yet Cattell may be best remembered for his uncompromising opposition to American involvement in World War I. His public opposition to the draft led to his dismissal from his position at Columbia University, a move that later led many American universities to establish tenure as a means of protecting unpopular beliefs.