Step 1: Identify the Core Question:
The query requires identifying the psychologist responsible for a highly significant and impactful definition of personality in psychological history.
Step 2: Provide Context and Analysis:
The definition, "Personality is the dynamic organization within the individual of those psychophysical systems that determine his unique adjustments to his environment," originated with Gordon Allport. This definition was published in his foundational 1937 work, *Personality: A Psychological Interpretation*.
This definition is characterized by Allport's key concepts:
Dynamic organization: Highlights personality's evolving and structured nature.
Psychophysical systems: Acknowledges the interplay of psychological and biological influences on personality.
Determine: Positions personality as an active driver of behavior, not merely an outward appearance.
Unique adjustments: Stresses individual distinctiveness and personality's adaptive role.
The other psychologists mentioned are not associated with this particular definition, as their theoretical frameworks differed.
Step 3: State the Conclusion:
Gordon Allport is credited with the provided definition of personality.