Who developed the first widely accepted theory of personality across the lifespan?

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Erikson is credited with developing the first widely accepted theory of personality across the lifespan. He proposed eight stages of psychosocial development that individuals go through from birth to old age, each marked by a conflict or crisis that must be resolved in order to successfully move onto the next stage. His theory emphasizes the importance of social and cultural factors in shaping personality development.

Who Developed the First Widely Accepted Theory of Personality Across