Occupational therapy traces its roots to the late 1700s, when reformers in mental institutions began using purposeful activities like gardening, music, and manual crafts to help patients recover. The profession was formally established on March 15, 1917, when six founders met at a sanitarium in upstate New York and created the first professional organization for the field. From those beginnings, two world wars and a series of federal laws transformed occupational therapy from a niche idea in psychiatric care into one of the fastest-growing health professions in the world.
The Moral Treatment Movement
Before occupational therapy had a name, its core principle was already being practiced in European and American asylums. Starting in the late 18th century, a reform philosophy known as “moral treatment” challenged the brutal conditions that mentally ill patients typically endured. Instead of chains and isolation, moral treatment emphasized compassion, structured daily routines, and therapeutic optimism, the belief that patients could actually get better. Occupational treatment was one of its key components: patients were encouraged to engage in productive tasks like weaving, farming, or woodworking as a path toward recovery.
Moral treatment had real limitations. It worked best for wealthier patients in smaller, well-funded facilities and was largely impractical for people with severe illness or for the overcrowded public asylums that housed most patients. Still, the movement planted an essential seed. It demonstrated that structured, meaningful activity could serve a therapeutic purpose, an idea that would become the philosophical backbone of occupational therapy a century later.
The 1917 Founding
The profession officially came together at Consolation House, a boarding house and creative workshop in Clifton Springs, New York. On March 15, 1917, six people gathered there to establish the National Society for the Promotion of Occupational Therapy (NSPOT). The founders were George Edward Barton, an architect who had experienced disability firsthand and ran Consolation House; Eleanor Clarke Slagle, a social worker who would become the field’s most influential early leader; William Rush Dunton, a psychiatrist who had long championed craft-based therapy; Susan Cox Johnson, a teacher of arts and crafts; Thomas Bessell Kidner, a vocational rehabilitation specialist; and Isabel Newton, Barton’s secretary and a key organizer of the meeting.
What united this group was the conviction that engaging in purposeful daily activities could restore health. They came from different professional backgrounds, which gave the new organization a broad scope from the start. It wasn’t purely medical or purely vocational. It sat at the intersection of mental health, physical rehabilitation, education, and social reform.
By 1921, the organization had already outgrown its original name. The NSPOT revised its constitution and became the American Occupational Therapy Association (AOTA), establishing a House of Delegates to broaden its governance. Eleanor Clarke Slagle pushed for the change, wanting, as she described it, “to put the association in the hands of a larger group of people.”
Eleanor Clarke Slagle and Habit Training
Among the founders, Slagle’s influence on the profession’s early direction was unmatched. She developed a treatment approach called “habit training,” designed for people with chronic mental illness whose daily lives had become deeply disordered. The program focused on rebalancing three areas of life: work, rest, and play. Patients followed structured daily schedules that rebuilt basic routines, from personal hygiene to simple productive tasks, gradually increasing in complexity as they improved.
Habit training became one of the first clearly defined treatment methods in occupational therapy. It reflected the profession’s foundational belief that health isn’t just about treating a disease or injury. It’s about helping a person function in everyday life. AOTA’s highest professional honor is still named the Eleanor Clarke Slagle Lectureship.
World War I and Reconstruction Aides
The timing of the 1917 founding was significant. The United States entered World War I just weeks later, and the military suddenly faced enormous numbers of soldiers with devastating physical and psychological injuries. The U.S. Army began recruiting women, called “reconstruction aides,” to provide occupational therapy in military hospitals. By January 1919, 455 aides were serving, with 358 stationed at hospitals in the United States and 97 deployed overseas.
These aides treated soldiers with fractures, gunshot wounds, peripheral nerve injuries, and amputations. They also worked with psychological casualties. The military classified a range of conditions as “war neuroses,” including what would now be recognized as post-traumatic stress, anxiety disorders, and exhaustion syndromes. For soldiers with these functional neuroses, occupational therapy was used with the direct goal of returning them to duty. Soldiers with more severe psychiatric conditions were sent back to the United States for longer-term care.
The war accomplished something that years of advocacy alone might not have. It proved on a massive scale that purposeful activity could help injured people regain function. It also gave the profession visibility, a workforce pipeline, and credibility within the medical establishment. Reconstruction aides were the first generation of occupational therapy practitioners to work alongside physicians and nurses in a formal clinical setting.
World War II and Physical Rehabilitation
The Second World War repeated and amplified this pattern. The flood of disabled veterans after 1945 drove a major expansion in physical medicine and rehabilitation services across the country. Occupational therapists were central to this effort, helping veterans with amputations, spinal cord injuries, and other conditions relearn the skills of daily life.
Federal legislation cemented this growth. The Barden-LaFollette Act of 1943 amended earlier vocational rehabilitation law to authorize payments for physical restoration services aimed at reducing or eliminating disabilities. Critically, it also extended services to people with emotional or mental challenges, broadening who could receive federally funded rehabilitation. This legal framework gave occupational therapy a stable funding source and an expanding patient population that went well beyond its psychiatric origins.
From Wartime Roots to Modern Practice
The profession’s arc from 1917 onward followed a clear trajectory. It began in mental health, grounded in the idea that structured daily activity could help people with psychiatric illness. World War I pulled it into physical rehabilitation. World War II and subsequent legislation made that shift permanent and nationwide. Each expansion brought new clinical settings, new patient populations, and new techniques, but the underlying philosophy stayed remarkably consistent: people heal by doing meaningful things.
By the mid-20th century, occupational therapy had established itself in hospitals, rehabilitation centers, schools, and community health programs. The profession that six people founded in a New York boarding house had become an essential part of the healthcare system, shaped at every stage by a conviction that everyday activity is not just a byproduct of health but a tool for achieving it.