Final answer:
Maslow himself estimated that fewer adults achieve total self-actualization.
Step-by-step explanation:
The statement that Maslow himself estimated that fewer adults achieve total self-actualization is True. Maslow's hierarchy of needs suggests that self-actualization, which is the highest level of psychological development, is achieved by a smaller percentage of individuals. It is estimated that only a small proportion of adults reach this level of personal fulfillment and self-realization.