A Society of Consulting Psychology (SCP), survey, The Best of the Century (BoC) found Freud, Lewin, Maslow, and Argyris to have the "strongest influence on consulting psychology" in the 20 th century. Lewin, Kelly, and Levinson were identified as having the "most influence on my practice. " Organizational Diagnosis (Levinson, 1972) was considered the most significant contribution to consulting psychology literature. Modeled on the critical incident technique (Flanagan, 1954), the BoC survey asked about: (1) influences on the practice of consulting psychology (CP); (2) influences on the respondent's consulting practice; (3) books and articles that influenced CP; (4) unfinished business that will impact the future; and, ( 5) notable achievements or bluners of the 20 th century. Personality theories and intervention methods were considered the greatest achievement. "Overestimating, overselling, overemphasizing, and overdoing of behaviorism" received resounding endorsement as the blunder of the century. The pressing future need was seen as an identity issue: What differentiates consulting psychologists from other types of consultants? How can psychologists influence public perceptions of what consulting psychologists do, and can do? The caveat for the future: avoiding cookie-cutter approaches.