Final answer:
Erik Erikson is the theorist who proposed that individuals develop throughout their entire lifespan, via his psychosocial theory of development.
Step-by-step explanation:
Psychologist Erik Erikson proposed the notion that individuals continue to develop well into adulthood. His theory of personality development includes eight stages that individuals move through throughout their lives, from birth to death. Erikson believed that personality is shaped by social interactions and the successful completion of social tasks, in contrast to Freud's focus on psychosexual stages and basic human urges.
The theorist who put forward the notion that individuals continue to develop well into adulthood was Erik Erikson. Erikson proposed a theory of personality development that spans the entire lifespan.
His psychosocial theory of development includes eight stages, from birth to death, and diverges from Freud's psychosexual stages by emphasizing the social aspects of development and the challenges encountered in the interaction between individual needs and societal expectations.