Counseling psychology developed in the 1950s out of applied psychology, which at that time was the application of the psychology of individual differences. The present article traces this historical development, from individual differences psychology through psychological testing, vocational counseling, and student personnel work, to counseling psychology. The individual differences tradition in counseling psychology research and practice is described, and the ways in which individual differences psychology has influenced counseling psychology and how, in turn, counseling psychology has contributed to the psychology of individual differences are discussed. The article concludes with speculations on the future relationship between the two fields."Psychology," in Ebbinghaus's famous phrase, "has a long past but only a short history" (cited in Beck, 1985, p. 666). Psychology's past reaches back at least to Aristotle and the Greek philosophers, but psychology's history can only be reckoned from 1860, with Gustav Fechner, or from 1879, with Wilhelm Wundt. (The American Psychological Association [APA] was not organized until 1892 and was not incorporated until 1925incorporated until , Fernberger, 1932 Ebbinghaus's much quoted saying can be paraphrased (with apologies) in the following manner: "Counseling has a long past, but counseling psychology has only a short history." Counseling can easily be considered as one of the world's oldest professions. Ancient kings invariably required the services of "counselors." Ancient books spoke of giving and receiving "counsel." Yet counseling psychology's identity as a professional field can only be traced back to 1951, when the Northwestern Conference recommended naming the field "counseling psychology," or to 1952, when the Veterans Administration established the new position of counseling psychologist and APA's Division 17 changed its name from "Counseling and Guidance" to "Counseling Psychology" (Whitely, 1984). According to Wrenn (cited in Whitely, 1984), the name change came about because psychologists were uncomfortable with the title, "Counseling and Guidance" (which was also used by nonpsychologists) and because there was a need to differentiate the field from clinical psychology, which by then had defined itself as oriented toward psychopathology and psychotherapy.I am grateful to Michael J. Patton and Mary Sue Richardson for their insightful comments, helpful suggestions, and sympathetic support, and to David Lubinski for many stimulating discussions about individual differences.