Gordon Willard Allport was an American psychologist. Allport was one of the first psychologists to focus on the study of the personality, and is often referred to as one of the founding figures of personality psychology. He contributed to the formation of values scales and rejected both a psychoanalytic approach to personality, which he thought often was too deeply interpretive, and a behavioral approach, which he thought did not provide deep enough interpretations from their data. Instead of these popular approaches, he developed an eclectic theory based on traits. He emphasized the uniqueness of each individual, and the importance of the present context, as opposed to past history, for understanding the personality.
Read article on Wikipedia