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A Century Ago, Adolescents Weren’t Fully Human

The New York Times's profile
Original Story by The New York Times
July 7, 2025
A Century Ago, Adolescents Weren’t Fully Human

Context:

A century ago, G. Stanley Hall pioneered the study of adolescence, viewing teenagers as a primitive stage of human evolution, akin to pre-human ancestors. At the time, adolescence was not recognized as a distinct phase, and Hall's ideas were radical, linking adolescent behaviors to evolutionary biology with concepts like recapitulation theory. His work was influenced by societal changes such as industrialization, immigration, and urbanization, and he advocated for structured education to guide adolescents through this tumultuous period. Although his evolutionary perspective on adolescence was eventually debunked, Hall laid the foundation for understanding the plasticity and developmental challenges of adolescent minds. Today, adolescence is recognized as a period of cognitive and social development, where behaviors once deemed primitive are now seen as explorations of identity and adaptation to a rapidly changing world.

Dive Deeper:

  • G. Stanley Hall was a pioneer in adolescent psychology, proposing that teenagers were in a primitive, pre-human stage of evolution, reflecting the recapitulation theory popular in the late 1800s. He believed adolescence was a replay of early human development stages and was critical of the influence of urban environments on adolescents.

  • Before Hall's work, adolescence was not recognized as a distinct life phase, with young people transitioning directly from childhood to adulthood. Hall's efforts helped define adolescence as a unique period requiring understanding and education to aid in their development.

  • Hall's observations linked adolescent behaviors to evolutionary biology, suggesting that as adolescents matured, they replayed stages of human evolution, which explained their perceived immaturity and need for structured environments to complete their development.

  • Despite the eventual dismissal of Hall's evolutionary theories, his work highlighted the plasticity of adolescent minds and the importance of education and structure during this developmental phase. His ideas on structured learning environments and adolescent plasticity have endured and influenced modern educational practices.

  • Contemporary views on adolescence recognize it as a time of significant cognitive and social development, characterized by heightened sensitivity and exploration. Modern scholars integrate behavioral observations with neuroscience, understanding adolescents as individuals navigating complex social and informational landscapes.

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